diff --git a/src/node/coinstats.cpp b/src/node/coinstats.cpp
index a9e4f9ea3..7179383d8 100644
--- a/src/node/coinstats.cpp
+++ b/src/node/coinstats.cpp
@@ -1,186 +1,186 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <node/coinstats.h>
 
 #include <coins.h>
 #include <crypto/muhash.h>
 #include <hash.h>
 #include <index/coinstatsindex.h>
 #include <primitives/txid.h>
 #include <serialize.h>
 #include <util/check.h>
 #include <util/system.h>
 #include <validation.h>
 
 #include <map>
 
 uint64_t GetBogoSize(const CScript &script_pub_key) {
     return 32 /* txid */ + 4 /* vout index */ + 4 /* height + coinbase */ +
            8 /* amount */ + 2 /* scriptPubKey len */ +
            script_pub_key.size() /* scriptPubKey */;
 }
 
 CDataStream TxOutSer(const COutPoint &outpoint, const Coin &coin) {
     CDataStream ss(SER_DISK, PROTOCOL_VERSION);
     ss << outpoint;
     ss << static_cast<uint32_t>(coin.GetHeight() * 2 + coin.IsCoinBase());
     ss << coin.GetTxOut();
     return ss;
 }
 
 //! Warning: be very careful when changing this! assumeutxo and UTXO snapshot
 //! validation commitments are reliant on the hash constructed by this
 //! function.
 //!
 //! If the construction of this hash is changed, it will invalidate
 //! existing UTXO snapshots. This will not result in any kind of consensus
 //! failure, but it will force clients that were expecting to make use of
 //! assumeutxo to do traditional IBD instead.
 //!
 //! It is also possible, though very unlikely, that a change in this
 //! construction could cause a previously invalid (and potentially malicious)
 //! UTXO snapshot to be considered valid.
 static void ApplyHash(CHashWriter &ss, const TxId &txid,
                       const std::map<uint32_t, Coin> &outputs) {
     for (auto it = outputs.begin(); it != outputs.end(); ++it) {
         if (it == outputs.begin()) {
             ss << txid;
             ss << VARINT(it->second.GetHeight() * 2 + it->second.IsCoinBase());
         }
 
         ss << VARINT(it->first + 1);
         ss << it->second.GetTxOut().scriptPubKey;
         ss << VARINT_MODE(it->second.GetTxOut().nValue / SATOSHI,
                           VarIntMode::NONNEGATIVE_SIGNED);
 
         if (it == std::prev(outputs.end())) {
             ss << VARINT(0u);
         }
     }
 }
 
 static void ApplyHash(std::nullptr_t, const TxId &txid,
                       const std::map<uint32_t, Coin> &outputs) {}
 
 static void ApplyHash(MuHash3072 &muhash, const TxId &txid,
                       const std::map<uint32_t, Coin> &outputs) {
     for (auto it = outputs.begin(); it != outputs.end(); ++it) {
         COutPoint outpoint = COutPoint(txid, it->first);
         Coin coin = it->second;
         muhash.Insert(MakeUCharSpan(TxOutSer(outpoint, coin)));
     }
 }
 
 static void ApplyStats(CCoinsStats &stats, const TxId &txid,
                        const std::map<uint32_t, Coin> &outputs) {
     assert(!outputs.empty());
     stats.nTransactions++;
     for (auto it = outputs.begin(); it != outputs.end(); ++it) {
         stats.nTransactionOutputs++;
         stats.nTotalAmount += it->second.GetTxOut().nValue;
         stats.nBogoSize += GetBogoSize(it->second.GetTxOut().scriptPubKey);
     }
 }
 
 //! Calculate statistics about the unspent transaction output set
 template <typename T>
 static bool GetUTXOStats(CCoinsView *view, BlockManager &blockman,
                          CCoinsStats &stats, T hash_obj,
                          const std::function<void()> &interruption_point,
                          const CBlockIndex *pindex) {
     std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
     assert(pcursor);
 
     if (!pindex) {
         LOCK(cs_main);
         assert(std::addressof(g_chainman.m_blockman) ==
                std::addressof(blockman));
         pindex = blockman.LookupBlockIndex(view->GetBestBlock());
     }
     stats.nHeight = Assert(pindex)->nHeight;
     stats.hashBlock = pindex->GetBlockHash();
 
-    // Use CoinStatsIndex if it is available and a hash_type of Muhash or None
-    // was requested
+    // Use CoinStatsIndex if it is requested and available and a hash_type of
+    // Muhash or None was requested
     if ((stats.m_hash_type == CoinStatsHashType::MUHASH ||
          stats.m_hash_type == CoinStatsHashType::NONE) &&
-        g_coin_stats_index) {
-        stats.from_index = true;
+        g_coin_stats_index && stats.index_requested) {
+        stats.index_used = true;
         return g_coin_stats_index->LookUpStats(pindex, stats);
     }
 
     PrepareHash(hash_obj, stats);
 
     TxId prevkey;
     std::map<uint32_t, Coin> outputs;
     while (pcursor->Valid()) {
         interruption_point();
         COutPoint key;
         Coin coin;
         if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
             if (!outputs.empty() && key.GetTxId() != prevkey) {
                 ApplyStats(stats, prevkey, outputs);
                 ApplyHash(hash_obj, prevkey, outputs);
                 outputs.clear();
             }
             prevkey = key.GetTxId();
             outputs[key.GetN()] = std::move(coin);
             stats.coins_count++;
         } else {
             return error("%s: unable to read value", __func__);
         }
         pcursor->Next();
     }
     if (!outputs.empty()) {
         ApplyStats(stats, prevkey, outputs);
         ApplyHash(hash_obj, prevkey, outputs);
     }
 
     FinalizeHash(hash_obj, stats);
 
     stats.nDiskSize = view->EstimateSize();
     return true;
 }
 
 bool GetUTXOStats(CCoinsView *view, BlockManager &blockman, CCoinsStats &stats,
                   const std::function<void()> &interruption_point,
                   const CBlockIndex *pindex) {
     switch (stats.m_hash_type) {
         case (CoinStatsHashType::HASH_SERIALIZED): {
             CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
             return GetUTXOStats(view, blockman, stats, ss, interruption_point,
                                 pindex);
         }
         case (CoinStatsHashType::MUHASH): {
             MuHash3072 muhash;
             return GetUTXOStats(view, blockman, stats, muhash,
                                 interruption_point, pindex);
         }
         case (CoinStatsHashType::NONE): {
             return GetUTXOStats(view, blockman, stats, nullptr,
                                 interruption_point, pindex);
         }
     } // no default case, so the compiler can warn about missing cases
     assert(false);
 }
 
 // The legacy hash serializes the hashBlock
 static void PrepareHash(CHashWriter &ss, const CCoinsStats &stats) {
     ss << stats.hashBlock;
 }
 // MuHash does not need the prepare step
 static void PrepareHash(MuHash3072 &muhash, CCoinsStats &stats) {}
 static void PrepareHash(std::nullptr_t, CCoinsStats &stats) {}
 
 static void FinalizeHash(CHashWriter &ss, CCoinsStats &stats) {
     stats.hashSerialized = ss.GetHash();
 }
 static void FinalizeHash(MuHash3072 &muhash, CCoinsStats &stats) {
     uint256 out;
     muhash.Finalize(out);
     stats.hashSerialized = out;
 }
 static void FinalizeHash(std::nullptr_t, CCoinsStats &stats) {}
diff --git a/src/node/coinstats.h b/src/node/coinstats.h
index fde224098..f8da211fe 100644
--- a/src/node/coinstats.h
+++ b/src/node/coinstats.h
@@ -1,67 +1,70 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_NODE_COINSTATS_H
 #define BITCOIN_NODE_COINSTATS_H
 
 #include <amount.h>
 #include <chain.h>
 #include <coins.h>
 #include <primitives/blockhash.h>
 #include <streams.h>
 #include <uint256.h>
 
 #include <cstdint>
 #include <functional>
 
 class BlockManager;
 class CCoinsView;
 
 enum class CoinStatsHashType {
     HASH_SERIALIZED,
     MUHASH,
     NONE,
 };
 
 struct CCoinsStats {
     CoinStatsHashType m_hash_type;
     int nHeight{0};
     BlockHash hashBlock{};
     uint64_t nTransactions{0};
     uint64_t nTransactionOutputs{0};
     uint64_t nBogoSize{0};
     uint256 hashSerialized{};
     uint64_t nDiskSize{0};
     Amount nTotalAmount{Amount::zero()};
 
     //! The number of coins contained.
     uint64_t coins_count{0};
 
-    bool from_index{false};
+    //! Signals if the coinstatsindex should be used (when available).
+    bool index_requested{true};
+    //! Signals if the coinstatsindex was used to retrieve the statistics.
+    bool index_used{false};
 
     // Following values are only available from coinstats index
     Amount total_subsidy{Amount::zero()};
     Amount total_unspendable_amount{Amount::zero()};
     Amount total_prevout_spent_amount{Amount::zero()};
     Amount total_new_outputs_ex_coinbase_amount{Amount::zero()};
     Amount total_coinbase_amount{Amount::zero()};
     Amount total_unspendables_genesis_block{Amount::zero()};
     Amount total_unspendables_bip30{Amount::zero()};
     Amount total_unspendables_scripts{Amount::zero()};
     Amount total_unspendables_unclaimed_rewards{Amount::zero()};
 
     CCoinsStats(CoinStatsHashType hash_type) : m_hash_type(hash_type) {}
 };
 
 //! Calculate statistics about the unspent transaction output set
 bool GetUTXOStats(CCoinsView *view, BlockManager &blockman, CCoinsStats &stats,
                   const std::function<void()> &interruption_point = {},
                   const CBlockIndex *pindex = nullptr);
 
 uint64_t GetBogoSize(const CScript &script_pub_key);
 
 CDataStream TxOutSer(const COutPoint &outpoint, const Coin &coin);
 
 #endif // BITCOIN_NODE_COINSTATS_H
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 861f9851a..64567838a 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1,3320 +1,3324 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <rpc/blockchain.h>
 
 #include <amount.h>
 #include <blockdb.h>
 #include <blockfilter.h>
 #include <chain.h>
 #include <chainparams.h>
 #include <coins.h>
 #include <config.h>
 #include <consensus/validation.h>
 #include <core_io.h>
 #include <hash.h>
 #include <index/blockfilterindex.h>
 #include <index/coinstatsindex.h>
 #include <node/blockstorage.h>
 #include <node/coinstats.h>
 #include <node/context.h>
 #include <node/utxo_snapshot.h>
 #include <policy/policy.h>
 #include <primitives/transaction.h>
 #include <rpc/server.h>
 #include <rpc/util.h>
 #include <script/descriptor.h>
 #include <streams.h>
 #include <txdb.h>
 #include <txmempool.h>
 #include <undo.h>
 #include <util/strencodings.h>
 #include <util/system.h>
 #include <util/translation.h>
 #include <validation.h>
 #include <validationinterface.h>
 #include <versionbitsinfo.h> // For VersionBitsDeploymentInfo
 #include <warnings.h>
 
 #include <condition_variable>
 #include <cstdint>
 #include <memory>
 #include <mutex>
 
 struct CUpdatedBlock {
     BlockHash hash;
     int height;
 };
 
 static Mutex cs_blockchange;
 static std::condition_variable cond_blockchange;
 static CUpdatedBlock latestblock GUARDED_BY(cs_blockchange);
 
 NodeContext &EnsureAnyNodeContext(const std::any &context) {
     auto node_context = util::AnyPtr<NodeContext>(context);
     if (!node_context) {
         throw JSONRPCError(RPC_INTERNAL_ERROR, "Node context not found");
     }
     return *node_context;
 }
 
 CTxMemPool &EnsureMemPool(const NodeContext &node) {
     if (!node.mempool) {
         throw JSONRPCError(RPC_CLIENT_MEMPOOL_DISABLED,
                            "Mempool disabled or instance not found");
     }
     return *node.mempool;
 }
 
 CTxMemPool &EnsureAnyMemPool(const std::any &context) {
     return EnsureMemPool(EnsureAnyNodeContext(context));
 }
 
 ChainstateManager &EnsureChainman(const NodeContext &node) {
     if (!node.chainman) {
         throw JSONRPCError(RPC_INTERNAL_ERROR, "Node chainman not found");
     }
     return *node.chainman;
 }
 
 ChainstateManager &EnsureAnyChainman(const std::any &context) {
     return EnsureChainman(EnsureAnyNodeContext(context));
 }
 
 /**
  * Calculate the difficulty for a given block index.
  */
 double GetDifficulty(const CBlockIndex *blockindex) {
     CHECK_NONFATAL(blockindex);
 
     int nShift = (blockindex->nBits >> 24) & 0xff;
     double dDiff = double(0x0000ffff) / double(blockindex->nBits & 0x00ffffff);
 
     while (nShift < 29) {
         dDiff *= 256.0;
         nShift++;
     }
     while (nShift > 29) {
         dDiff /= 256.0;
         nShift--;
     }
 
     return dDiff;
 }
 
 static int ComputeNextBlockAndDepth(const CBlockIndex *tip,
                                     const CBlockIndex *blockindex,
                                     const CBlockIndex *&next) {
     next = tip->GetAncestor(blockindex->nHeight + 1);
     if (next && next->pprev == blockindex) {
         return tip->nHeight - blockindex->nHeight + 1;
     }
     next = nullptr;
     return blockindex == tip ? 1 : -1;
 }
 
 static CBlockIndex *ParseHashOrHeight(const UniValue &param,
                                       ChainstateManager &chainman) {
     LOCK(::cs_main);
     CChain &active_chain = chainman.ActiveChain();
 
     if (param.isNum()) {
         const int height{param.get_int()};
         if (height < 0) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 strprintf("Target block height %d is negative", height));
         }
         const int current_tip{active_chain.Height()};
         if (height > current_tip) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 strprintf("Target block height %d after current tip %d", height,
                           current_tip));
         }
 
         return active_chain[height];
     } else {
         const BlockHash hash{ParseHashV(param, "hash_or_height")};
         CBlockIndex *pindex = chainman.m_blockman.LookupBlockIndex(hash);
 
         if (!pindex) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
         }
         if (!active_chain.Contains(pindex)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                strprintf("Block is not in chain %s",
                                          Params().NetworkIDString()));
         }
         return pindex;
     }
 }
 UniValue blockheaderToJSON(const CBlockIndex *tip,
                            const CBlockIndex *blockindex) {
     // Serialize passed information without accessing chain state of the active
     // chain!
     // For performance reasons
     AssertLockNotHeld(cs_main);
 
     UniValue result(UniValue::VOBJ);
     result.pushKV("hash", blockindex->GetBlockHash().GetHex());
     const CBlockIndex *pnext;
     int confirmations = ComputeNextBlockAndDepth(tip, blockindex, pnext);
     result.pushKV("confirmations", confirmations);
     result.pushKV("height", blockindex->nHeight);
     result.pushKV("version", blockindex->nVersion);
     result.pushKV("versionHex", strprintf("%08x", blockindex->nVersion));
     result.pushKV("merkleroot", blockindex->hashMerkleRoot.GetHex());
     result.pushKV("time", int64_t(blockindex->nTime));
     result.pushKV("mediantime", int64_t(blockindex->GetMedianTimePast()));
     result.pushKV("nonce", uint64_t(blockindex->nNonce));
     result.pushKV("bits", strprintf("%08x", blockindex->nBits));
     result.pushKV("difficulty", GetDifficulty(blockindex));
     result.pushKV("chainwork", blockindex->nChainWork.GetHex());
     result.pushKV("nTx", uint64_t(blockindex->nTx));
 
     if (blockindex->pprev) {
         result.pushKV("previousblockhash",
                       blockindex->pprev->GetBlockHash().GetHex());
     }
     if (pnext) {
         result.pushKV("nextblockhash", pnext->GetBlockHash().GetHex());
     }
     return result;
 }
 
 UniValue blockToJSON(const CBlock &block, const CBlockIndex *tip,
                      const CBlockIndex *blockindex, bool txDetails) {
     UniValue result = blockheaderToJSON(tip, blockindex);
 
     result.pushKV("size", (int)::GetSerializeSize(block, PROTOCOL_VERSION));
     UniValue txs(UniValue::VARR);
     for (const auto &tx : block.vtx) {
         if (txDetails) {
             UniValue objTx(UniValue::VOBJ);
             TxToUniv(*tx, uint256(), objTx, true, RPCSerializationFlags());
             txs.push_back(objTx);
         } else {
             txs.push_back(tx->GetId().GetHex());
         }
     }
     result.pushKV("tx", txs);
 
     return result;
 }
 
 static RPCHelpMan getblockcount() {
     return RPCHelpMan{
         "getblockcount",
         "Returns the height of the most-work fully-validated chain.\n"
         "The genesis block has height 0.\n",
         {},
         RPCResult{RPCResult::Type::NUM, "", "The current block count"},
         RPCExamples{HelpExampleCli("getblockcount", "") +
                     HelpExampleRpc("getblockcount", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             return chainman.ActiveHeight();
         },
     };
 }
 
 static RPCHelpMan getbestblockhash() {
     return RPCHelpMan{
         "getbestblockhash",
         "Returns the hash of the best (tip) block in the "
         "most-work fully-validated chain.\n",
         {},
         RPCResult{RPCResult::Type::STR_HEX, "", "the block hash, hex-encoded"},
         RPCExamples{HelpExampleCli("getbestblockhash", "") +
                     HelpExampleRpc("getbestblockhash", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             return chainman.ActiveTip()->GetBlockHash().GetHex();
         },
     };
 }
 
 RPCHelpMan getfinalizedblockhash() {
     return RPCHelpMan{
         "getfinalizedblockhash",
         "Returns the hash of the currently finalized block\n",
         {},
         RPCResult{RPCResult::Type::STR_HEX, "", "the block hash, hex-encoded"},
         RPCExamples{HelpExampleCli("getfinalizedblockhash", "") +
                     HelpExampleRpc("getfinalizedblockhash", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             CChainState &active_chainstate = chainman.ActiveChainstate();
             const CBlockIndex *blockIndexFinalized =
                 active_chainstate.GetFinalizedBlock();
             if (blockIndexFinalized) {
                 return blockIndexFinalized->GetBlockHash().GetHex();
             }
             return UniValue(UniValue::VSTR);
         },
     };
 }
 
 void RPCNotifyBlockChange(const CBlockIndex *pindex) {
     if (pindex) {
         LOCK(cs_blockchange);
         latestblock.hash = pindex->GetBlockHash();
         latestblock.height = pindex->nHeight;
     }
     cond_blockchange.notify_all();
 }
 
 static RPCHelpMan waitfornewblock() {
     return RPCHelpMan{
         "waitfornewblock",
         "Waits for a specific new block and returns useful info about it.\n"
         "\nReturns the current block on timeout or exit.\n",
         {
             {"timeout", RPCArg::Type::NUM, /* default */ "0",
              "Time in milliseconds to wait for a response. 0 indicates no "
              "timeout."},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::STR_HEX, "hash", "The blockhash"},
                       {RPCResult::Type::NUM, "height", "Block height"},
                   }},
         RPCExamples{HelpExampleCli("waitfornewblock", "1000") +
                     HelpExampleRpc("waitfornewblock", "1000")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             int timeout = 0;
             if (!request.params[0].isNull()) {
                 timeout = request.params[0].get_int();
             }
 
             CUpdatedBlock block;
             {
                 WAIT_LOCK(cs_blockchange, lock);
                 block = latestblock;
                 if (timeout) {
                     cond_blockchange.wait_for(
                         lock, std::chrono::milliseconds(timeout),
                         [&block]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.height != block.height ||
                                    latestblock.hash != block.hash ||
                                    !IsRPCRunning();
                         });
                 } else {
                     cond_blockchange.wait(
                         lock,
                         [&block]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.height != block.height ||
                                    latestblock.hash != block.hash ||
                                    !IsRPCRunning();
                         });
                 }
                 block = latestblock;
             }
             UniValue ret(UniValue::VOBJ);
             ret.pushKV("hash", block.hash.GetHex());
             ret.pushKV("height", block.height);
             return ret;
         },
     };
 }
 
 static RPCHelpMan waitforblock() {
     return RPCHelpMan{
         "waitforblock",
         "Waits for a specific new block and returns useful info about it.\n"
         "\nReturns the current block on timeout or exit.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "Block hash to wait for."},
             {"timeout", RPCArg::Type::NUM, /* default */ "0",
              "Time in milliseconds to wait for a response. 0 indicates no "
              "timeout."},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::STR_HEX, "hash", "The blockhash"},
                       {RPCResult::Type::NUM, "height", "Block height"},
                   }},
         RPCExamples{HelpExampleCli("waitforblock",
                                    "\"0000000000079f8ef3d2c688c244eb7a4570b24c9"
                                    "ed7b4a8c619eb02596f8862\" 1000") +
                     HelpExampleRpc("waitforblock",
                                    "\"0000000000079f8ef3d2c688c244eb7a4570b24c9"
                                    "ed7b4a8c619eb02596f8862\", 1000")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             int timeout = 0;
 
             BlockHash hash(ParseHashV(request.params[0], "blockhash"));
 
             if (!request.params[1].isNull()) {
                 timeout = request.params[1].get_int();
             }
 
             CUpdatedBlock block;
             {
                 WAIT_LOCK(cs_blockchange, lock);
                 if (timeout) {
                     cond_blockchange.wait_for(
                         lock, std::chrono::milliseconds(timeout),
                         [&hash]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.hash == hash || !IsRPCRunning();
                         });
                 } else {
                     cond_blockchange.wait(
                         lock,
                         [&hash]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.hash == hash || !IsRPCRunning();
                         });
                 }
                 block = latestblock;
             }
 
             UniValue ret(UniValue::VOBJ);
             ret.pushKV("hash", block.hash.GetHex());
             ret.pushKV("height", block.height);
             return ret;
         },
     };
 }
 
 static RPCHelpMan waitforblockheight() {
     return RPCHelpMan{
         "waitforblockheight",
         "Waits for (at least) block height and returns the height and "
         "hash\nof the current tip.\n"
         "\nReturns the current block on timeout or exit.\n",
         {
             {"height", RPCArg::Type::NUM, RPCArg::Optional::NO,
              "Block height to wait for."},
             {"timeout", RPCArg::Type::NUM, /* default */ "0",
              "Time in milliseconds to wait for a response. 0 indicates no "
              "timeout."},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::STR_HEX, "hash", "The blockhash"},
                       {RPCResult::Type::NUM, "height", "Block height"},
                   }},
         RPCExamples{HelpExampleCli("waitforblockheight", "100 1000") +
                     HelpExampleRpc("waitforblockheight", "100, 1000")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             int timeout = 0;
 
             int height = request.params[0].get_int();
 
             if (!request.params[1].isNull()) {
                 timeout = request.params[1].get_int();
             }
 
             CUpdatedBlock block;
             {
                 WAIT_LOCK(cs_blockchange, lock);
                 if (timeout) {
                     cond_blockchange.wait_for(
                         lock, std::chrono::milliseconds(timeout),
                         [&height]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.height >= height ||
                                    !IsRPCRunning();
                         });
                 } else {
                     cond_blockchange.wait(
                         lock,
                         [&height]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {
                             return latestblock.height >= height ||
                                    !IsRPCRunning();
                         });
                 }
                 block = latestblock;
             }
             UniValue ret(UniValue::VOBJ);
             ret.pushKV("hash", block.hash.GetHex());
             ret.pushKV("height", block.height);
             return ret;
         },
     };
 }
 
 static RPCHelpMan syncwithvalidationinterfacequeue() {
     return RPCHelpMan{
         "syncwithvalidationinterfacequeue",
         "Waits for the validation interface queue to catch up on everything "
         "that was there when we entered this function.\n",
         {},
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("syncwithvalidationinterfacequeue", "") +
                     HelpExampleRpc("syncwithvalidationinterfacequeue", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             SyncWithValidationInterfaceQueue();
             return NullUniValue;
         },
     };
 }
 
 static RPCHelpMan getdifficulty() {
     return RPCHelpMan{
         "getdifficulty",
         "Returns the proof-of-work difficulty as a multiple of the minimum "
         "difficulty.\n",
         {},
         RPCResult{RPCResult::Type::NUM, "",
                   "the proof-of-work difficulty as a multiple of the minimum "
                   "difficulty."},
         RPCExamples{HelpExampleCli("getdifficulty", "") +
                     HelpExampleRpc("getdifficulty", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             return GetDifficulty(chainman.ActiveTip());
         },
     };
 }
 
 static std::vector<RPCResult> MempoolEntryDescription() {
     const auto &ticker = Currency::get().ticker;
     return {
         RPCResult{RPCResult::Type::NUM, "size", "transaction size."},
         RPCResult{RPCResult::Type::STR_AMOUNT, "fee",
                   "transaction fee in " + ticker + " (DEPRECATED)"},
         RPCResult{RPCResult::Type::STR_AMOUNT, "modifiedfee",
                   "transaction fee with fee deltas used for mining priority "
                   "(DEPRECATED)"},
         RPCResult{RPCResult::Type::NUM_TIME, "time",
                   "local time transaction entered pool in seconds since 1 Jan "
                   "1970 GMT"},
         RPCResult{RPCResult::Type::NUM, "height",
                   "block height when transaction entered pool"},
         RPCResult{RPCResult::Type::NUM, "descendantcount",
                   "number of in-mempool descendant transactions (including "
                   "this one)"},
         RPCResult{RPCResult::Type::NUM, "descendantsize",
                   "transaction size of in-mempool descendants "
                   "(including this one)"},
         RPCResult{RPCResult::Type::STR_AMOUNT, "descendantfees",
                   "modified fees (see above) of in-mempool descendants "
                   "(including this one) (DEPRECATED)"},
         RPCResult{
             RPCResult::Type::NUM, "ancestorcount",
             "number of in-mempool ancestor transactions (including this one)"},
         RPCResult{
             RPCResult::Type::NUM, "ancestorsize",
             "transaction size of in-mempool ancestors (including this one)"},
         RPCResult{RPCResult::Type::STR_AMOUNT, "ancestorfees",
                   "modified fees (see above) of in-mempool ancestors "
                   "(including this one) (DEPRECATED)"},
         RPCResult{RPCResult::Type::OBJ,
                   "fees",
                   "",
                   {
                       RPCResult{RPCResult::Type::STR_AMOUNT, "base",
                                 "transaction fee in " + ticker},
                       RPCResult{RPCResult::Type::STR_AMOUNT, "modified",
                                 "transaction fee with fee deltas used for "
                                 "mining priority in " +
                                     ticker},
                       RPCResult{RPCResult::Type::STR_AMOUNT, "ancestor",
                                 "modified fees (see above) of in-mempool "
                                 "ancestors (including this one) in " +
                                     ticker},
                       RPCResult{RPCResult::Type::STR_AMOUNT, "descendant",
                                 "modified fees (see above) of in-mempool "
                                 "descendants (including this one) in " +
                                     ticker},
                   }},
         RPCResult{
             RPCResult::Type::ARR,
             "depends",
             "unconfirmed transactions used as inputs for this transaction",
             {RPCResult{RPCResult::Type::STR_HEX, "transactionid",
                        "parent transaction id"}}},
         RPCResult{
             RPCResult::Type::ARR,
             "spentby",
             "unconfirmed transactions spending outputs from this transaction",
             {RPCResult{RPCResult::Type::STR_HEX, "transactionid",
                        "child transaction id"}}},
         RPCResult{RPCResult::Type::BOOL, "unbroadcast",
                   "Whether this transaction is currently unbroadcast (initial "
                   "broadcast not yet acknowledged by any peers)"},
     };
 }
 
 static void entryToJSON(const CTxMemPool &pool, UniValue &info,
                         const CTxMemPoolEntry &e)
     EXCLUSIVE_LOCKS_REQUIRED(pool.cs) {
     AssertLockHeld(pool.cs);
 
     UniValue fees(UniValue::VOBJ);
     fees.pushKV("base", e.GetFee());
     fees.pushKV("modified", e.GetModifiedFee());
     fees.pushKV("ancestor", e.GetModFeesWithAncestors());
     fees.pushKV("descendant", e.GetModFeesWithDescendants());
     info.pushKV("fees", fees);
 
     info.pushKV("size", (int)e.GetTxSize());
     info.pushKV("fee", e.GetFee());
     info.pushKV("modifiedfee", e.GetModifiedFee());
     info.pushKV("time", count_seconds(e.GetTime()));
     info.pushKV("height", (int)e.GetHeight());
     info.pushKV("descendantcount", e.GetCountWithDescendants());
     info.pushKV("descendantsize", e.GetSizeWithDescendants());
     info.pushKV("descendantfees", e.GetModFeesWithDescendants() / SATOSHI);
     info.pushKV("ancestorcount", e.GetCountWithAncestors());
     info.pushKV("ancestorsize", e.GetSizeWithAncestors());
     info.pushKV("ancestorfees", e.GetModFeesWithAncestors() / SATOSHI);
     const CTransaction &tx = e.GetTx();
     std::set<std::string> setDepends;
     for (const CTxIn &txin : tx.vin) {
         if (pool.exists(txin.prevout.GetTxId())) {
             setDepends.insert(txin.prevout.GetTxId().ToString());
         }
     }
 
     UniValue depends(UniValue::VARR);
     for (const std::string &dep : setDepends) {
         depends.push_back(dep);
     }
 
     info.pushKV("depends", depends);
 
     UniValue spent(UniValue::VARR);
     const CTxMemPool::txiter &it = pool.mapTx.find(tx.GetId());
     const CTxMemPoolEntry::Children &children = it->GetMemPoolChildrenConst();
     for (const CTxMemPoolEntry &child : children) {
         spent.push_back(child.GetTx().GetId().ToString());
     }
 
     info.pushKV("spentby", spent);
     info.pushKV("unbroadcast", pool.IsUnbroadcastTx(tx.GetId()));
 }
 
 UniValue MempoolToJSON(const CTxMemPool &pool, bool verbose,
                        bool include_mempool_sequence) {
     if (verbose) {
         if (include_mempool_sequence) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 "Verbose results cannot contain mempool sequence values.");
         }
         LOCK(pool.cs);
         UniValue o(UniValue::VOBJ);
         for (const CTxMemPoolEntry &e : pool.mapTx) {
             const uint256 &txid = e.GetTx().GetId();
             UniValue info(UniValue::VOBJ);
             entryToJSON(pool, info, e);
             // Mempool has unique entries so there is no advantage in using
             // UniValue::pushKV, which checks if the key already exists in O(N).
             // UniValue::__pushKV is used instead which currently is O(1).
             o.__pushKV(txid.ToString(), info);
         }
         return o;
     } else {
         uint64_t mempool_sequence;
         std::vector<uint256> vtxids;
         {
             LOCK(pool.cs);
             pool.queryHashes(vtxids);
             mempool_sequence = pool.GetSequence();
         }
         UniValue a(UniValue::VARR);
         for (const uint256 &txid : vtxids) {
             a.push_back(txid.ToString());
         }
 
         if (!include_mempool_sequence) {
             return a;
         } else {
             UniValue o(UniValue::VOBJ);
             o.pushKV("txids", a);
             o.pushKV("mempool_sequence", mempool_sequence);
             return o;
         }
     }
 }
 
 static RPCHelpMan getrawmempool() {
     return RPCHelpMan{
         "getrawmempool",
         "Returns all transaction ids in memory pool as a json array of "
         "string transaction ids.\n"
         "\nHint: use getmempoolentry to fetch a specific transaction from the "
         "mempool.\n",
         {
             {"verbose", RPCArg::Type::BOOL, /* default */ "false",
              "True for a json object, false for array of transaction ids"},
             {"mempool_sequence", RPCArg::Type::BOOL, /* default */ "false",
              "If verbose=false, returns a json object with transaction list "
              "and mempool sequence number attached."},
         },
         {
             RPCResult{"for verbose = false",
                       RPCResult::Type::ARR,
                       "",
                       "",
                       {
                           {RPCResult::Type::STR_HEX, "", "The transaction id"},
                       }},
             RPCResult{"for verbose = true",
                       RPCResult::Type::OBJ_DYN,
                       "",
                       "",
                       {
                           {RPCResult::Type::OBJ, "transactionid", "",
                            MempoolEntryDescription()},
                       }},
             RPCResult{
                 "for verbose = false and mempool_sequence = true",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::ARR,
                      "txids",
                      "",
                      {
                          {RPCResult::Type::STR_HEX, "", "The transaction id"},
                      }},
                     {RPCResult::Type::NUM, "mempool_sequence",
                      "The mempool sequence value."},
                 }},
         },
         RPCExamples{HelpExampleCli("getrawmempool", "true") +
                     HelpExampleRpc("getrawmempool", "true")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             bool fVerbose = false;
             if (!request.params[0].isNull()) {
                 fVerbose = request.params[0].get_bool();
             }
 
             bool include_mempool_sequence = false;
             if (!request.params[1].isNull()) {
                 include_mempool_sequence = request.params[1].get_bool();
             }
 
             return MempoolToJSON(EnsureAnyMemPool(request.context), fVerbose,
                                  include_mempool_sequence);
         },
     };
 }
 
 static RPCHelpMan getmempoolancestors() {
     return RPCHelpMan{
         "getmempoolancestors",
         "If txid is in the mempool, returns all in-mempool ancestors.\n",
         {
             {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The transaction id (must be in mempool)"},
             {"verbose", RPCArg::Type::BOOL, /* default */ "false",
              "True for a json object, false for array of transaction ids"},
         },
         {
             RPCResult{
                 "for verbose = false",
                 RPCResult::Type::ARR,
                 "",
                 "",
                 {{RPCResult::Type::STR_HEX, "",
                   "The transaction id of an in-mempool ancestor transaction"}}},
             RPCResult{"for verbose = true",
                       RPCResult::Type::OBJ_DYN,
                       "",
                       "",
                       {
                           {RPCResult::Type::OBJ, "transactionid", "",
                            MempoolEntryDescription()},
                       }},
         },
         RPCExamples{HelpExampleCli("getmempoolancestors", "\"mytxid\"") +
                     HelpExampleRpc("getmempoolancestors", "\"mytxid\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             bool fVerbose = false;
             if (!request.params[1].isNull()) {
                 fVerbose = request.params[1].get_bool();
             }
 
             TxId txid(ParseHashV(request.params[0], "parameter 1"));
 
             const CTxMemPool &mempool = EnsureAnyMemPool(request.context);
             LOCK(mempool.cs);
 
             CTxMemPool::txiter it = mempool.mapTx.find(txid);
             if (it == mempool.mapTx.end()) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    "Transaction not in mempool");
             }
 
             CTxMemPool::setEntries setAncestors;
             uint64_t noLimit = std::numeric_limits<uint64_t>::max();
             std::string dummy;
             mempool.CalculateMemPoolAncestors(*it, setAncestors, noLimit,
                                               noLimit, noLimit, noLimit, dummy,
                                               false);
 
             if (!fVerbose) {
                 UniValue o(UniValue::VARR);
                 for (CTxMemPool::txiter ancestorIt : setAncestors) {
                     o.push_back(ancestorIt->GetTx().GetId().ToString());
                 }
                 return o;
             } else {
                 UniValue o(UniValue::VOBJ);
                 for (CTxMemPool::txiter ancestorIt : setAncestors) {
                     const CTxMemPoolEntry &e = *ancestorIt;
                     const TxId &_txid = e.GetTx().GetId();
                     UniValue info(UniValue::VOBJ);
                     entryToJSON(mempool, info, e);
                     o.pushKV(_txid.ToString(), info);
                 }
                 return o;
             }
         },
     };
 }
 
 static RPCHelpMan getmempooldescendants() {
     return RPCHelpMan{
         "getmempooldescendants",
         "If txid is in the mempool, returns all in-mempool descendants.\n",
         {
             {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The transaction id (must be in mempool)"},
             {"verbose", RPCArg::Type::BOOL, /* default */ "false",
              "True for a json object, false for array of transaction ids"},
         },
         {
             RPCResult{"for verbose = false",
                       RPCResult::Type::ARR,
                       "",
                       "",
                       {{RPCResult::Type::STR_HEX, "",
                         "The transaction id of an in-mempool descendant "
                         "transaction"}}},
             RPCResult{"for verbose = true",
                       RPCResult::Type::OBJ_DYN,
                       "",
                       "",
                       {
                           {RPCResult::Type::OBJ, "transactionid", "",
                            MempoolEntryDescription()},
                       }},
         },
         RPCExamples{HelpExampleCli("getmempooldescendants", "\"mytxid\"") +
                     HelpExampleRpc("getmempooldescendants", "\"mytxid\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             bool fVerbose = false;
             if (!request.params[1].isNull()) {
                 fVerbose = request.params[1].get_bool();
             }
 
             TxId txid(ParseHashV(request.params[0], "parameter 1"));
 
             const CTxMemPool &mempool = EnsureAnyMemPool(request.context);
             LOCK(mempool.cs);
 
             CTxMemPool::txiter it = mempool.mapTx.find(txid);
             if (it == mempool.mapTx.end()) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    "Transaction not in mempool");
             }
 
             CTxMemPool::setEntries setDescendants;
             mempool.CalculateDescendants(it, setDescendants);
             // CTxMemPool::CalculateDescendants will include the given tx
             setDescendants.erase(it);
 
             if (!fVerbose) {
                 UniValue o(UniValue::VARR);
                 for (CTxMemPool::txiter descendantIt : setDescendants) {
                     o.push_back(descendantIt->GetTx().GetId().ToString());
                 }
 
                 return o;
             } else {
                 UniValue o(UniValue::VOBJ);
                 for (CTxMemPool::txiter descendantIt : setDescendants) {
                     const CTxMemPoolEntry &e = *descendantIt;
                     const TxId &_txid = e.GetTx().GetId();
                     UniValue info(UniValue::VOBJ);
                     entryToJSON(mempool, info, e);
                     o.pushKV(_txid.ToString(), info);
                 }
                 return o;
             }
         },
     };
 }
 
 static RPCHelpMan getmempoolentry() {
     return RPCHelpMan{
         "getmempoolentry",
         "Returns mempool data for given transaction\n",
         {
             {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The transaction id (must be in mempool)"},
         },
         RPCResult{RPCResult::Type::OBJ, "", "", MempoolEntryDescription()},
         RPCExamples{HelpExampleCli("getmempoolentry", "\"mytxid\"") +
                     HelpExampleRpc("getmempoolentry", "\"mytxid\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             TxId txid(ParseHashV(request.params[0], "parameter 1"));
 
             const CTxMemPool &mempool = EnsureAnyMemPool(request.context);
             LOCK(mempool.cs);
 
             CTxMemPool::txiter it = mempool.mapTx.find(txid);
             if (it == mempool.mapTx.end()) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    "Transaction not in mempool");
             }
 
             const CTxMemPoolEntry &e = *it;
             UniValue info(UniValue::VOBJ);
             entryToJSON(mempool, info, e);
             return info;
         },
     };
 }
 
 static RPCHelpMan getblockhash() {
     return RPCHelpMan{
         "getblockhash",
         "Returns hash of block in best-block-chain at height provided.\n",
         {
             {"height", RPCArg::Type::NUM, RPCArg::Optional::NO,
              "The height index"},
         },
         RPCResult{RPCResult::Type::STR_HEX, "", "The block hash"},
         RPCExamples{HelpExampleCli("getblockhash", "1000") +
                     HelpExampleRpc("getblockhash", "1000")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             const CChain &active_chain = chainman.ActiveChain();
 
             int nHeight = request.params[0].get_int();
             if (nHeight < 0 || nHeight > active_chain.Height()) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,
                                    "Block height out of range");
             }
 
             CBlockIndex *pblockindex = active_chain[nHeight];
             return pblockindex->GetBlockHash().GetHex();
         },
     };
 }
 
 static RPCHelpMan getblockheader() {
     return RPCHelpMan{
         "getblockheader",
         "If verbose is false, returns a string that is serialized, hex-encoded "
         "data for blockheader 'hash'.\n"
         "If verbose is true, returns an Object with information about "
         "blockheader <hash>.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The block hash"},
             {"verbose", RPCArg::Type::BOOL, /* default */ "true",
              "true for a json object, false for the hex-encoded data"},
         },
         {
             RPCResult{
                 "for verbose = true",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::STR_HEX, "hash",
                      "the block hash (same as provided)"},
                     {RPCResult::Type::NUM, "confirmations",
                      "The number of confirmations, or -1 if the block is not "
                      "on the main chain"},
                     {RPCResult::Type::NUM, "height",
                      "The block height or index"},
                     {RPCResult::Type::NUM, "version", "The block version"},
                     {RPCResult::Type::STR_HEX, "versionHex",
                      "The block version formatted in hexadecimal"},
                     {RPCResult::Type::STR_HEX, "merkleroot", "The merkle root"},
                     {RPCResult::Type::NUM_TIME, "time",
                      "The block time expressed in " + UNIX_EPOCH_TIME},
                     {RPCResult::Type::NUM_TIME, "mediantime",
                      "The median block time expressed in " + UNIX_EPOCH_TIME},
                     {RPCResult::Type::NUM, "nonce", "The nonce"},
                     {RPCResult::Type::STR_HEX, "bits", "The bits"},
                     {RPCResult::Type::NUM, "difficulty", "The difficulty"},
                     {RPCResult::Type::STR_HEX, "chainwork",
                      "Expected number of hashes required to produce the "
                      "current chain"},
                     {RPCResult::Type::NUM, "nTx",
                      "The number of transactions in the block"},
                     {RPCResult::Type::STR_HEX, "previousblockhash",
                      /* optional */ true,
                      "The hash of the previous block (if available)"},
                     {RPCResult::Type::STR_HEX, "nextblockhash",
                      /* optional */ true,
                      "The hash of the next block (if available)"},
                 }},
             RPCResult{"for verbose=false", RPCResult::Type::STR_HEX, "",
                       "A string that is serialized, hex-encoded data for block "
                       "'hash'"},
         },
         RPCExamples{HelpExampleCli("getblockheader",
                                    "\"00000000c937983704a73af28acdec37b049d214a"
                                    "dbda81d7e2a3dd146f6ed09\"") +
                     HelpExampleRpc("getblockheader",
                                    "\"00000000c937983704a73af28acdec37b049d214a"
                                    "dbda81d7e2a3dd146f6ed09\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             BlockHash hash(ParseHashV(request.params[0], "hash"));
 
             bool fVerbose = true;
             if (!request.params[1].isNull()) {
                 fVerbose = request.params[1].get_bool();
             }
 
             const CBlockIndex *pblockindex;
             const CBlockIndex *tip;
             {
                 ChainstateManager &chainman =
                     EnsureAnyChainman(request.context);
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 tip = chainman.ActiveTip();
             }
 
             if (!pblockindex) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    "Block not found");
             }
 
             if (!fVerbose) {
                 CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
                 ssBlock << pblockindex->GetBlockHeader();
                 std::string strHex = HexStr(ssBlock);
                 return strHex;
             }
 
             return blockheaderToJSON(tip, pblockindex);
         },
     };
 }
 
 static CBlock GetBlockChecked(const Config &config,
                               const CBlockIndex *pblockindex) {
     CBlock block;
     if (IsBlockPruned(pblockindex)) {
         throw JSONRPCError(RPC_MISC_ERROR, "Block not available (pruned data)");
     }
 
     if (!ReadBlockFromDisk(block, pblockindex,
                            config.GetChainParams().GetConsensus())) {
         // Block not found on disk. This could be because we have the block
         // header in our index but not yet have the block or did not accept the
         // block.
         throw JSONRPCError(RPC_MISC_ERROR, "Block not found on disk");
     }
 
     return block;
 }
 
 static CBlockUndo GetUndoChecked(const CBlockIndex *pblockindex) {
     CBlockUndo blockUndo;
     if (IsBlockPruned(pblockindex)) {
         throw JSONRPCError(RPC_MISC_ERROR,
                            "Undo data not available (pruned data)");
     }
 
     if (!UndoReadFromDisk(blockUndo, pblockindex)) {
         throw JSONRPCError(RPC_MISC_ERROR, "Can't read undo data from disk");
     }
 
     return blockUndo;
 }
 
 static RPCHelpMan getblock() {
     return RPCHelpMan{
         "getblock",
         "If verbosity is 0 or false, returns a string that is serialized, "
         "hex-encoded data for block 'hash'.\n"
         "If verbosity is 1 or true, returns an Object with information about "
         "block <hash>.\n"
         "If verbosity is 2, returns an Object with information about block "
         "<hash> and information about each transaction.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The block hash"},
             {"verbosity|verbose", RPCArg::Type::NUM, /* default */ "1",
              "0 for hex-encoded data, 1 for a json object, and 2 for json "
              "object with transaction data"},
         },
         {
             RPCResult{"for verbosity = 0", RPCResult::Type::STR_HEX, "",
                       "A string that is serialized, hex-encoded data for block "
                       "'hash'"},
             RPCResult{
                 "for verbosity = 1",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::STR_HEX, "hash",
                      "the block hash (same as provided)"},
                     {RPCResult::Type::NUM, "confirmations",
                      "The number of confirmations, or -1 if the block is not "
                      "on the main chain"},
                     {RPCResult::Type::NUM, "size", "The block size"},
                     {RPCResult::Type::NUM, "height",
                      "The block height or index"},
                     {RPCResult::Type::NUM, "version", "The block version"},
                     {RPCResult::Type::STR_HEX, "versionHex",
                      "The block version formatted in hexadecimal"},
                     {RPCResult::Type::STR_HEX, "merkleroot", "The merkle root"},
                     {RPCResult::Type::ARR,
                      "tx",
                      "The transaction ids",
                      {{RPCResult::Type::STR_HEX, "", "The transaction id"}}},
                     {RPCResult::Type::NUM_TIME, "time",
                      "The block time expressed in " + UNIX_EPOCH_TIME},
                     {RPCResult::Type::NUM_TIME, "mediantime",
                      "The median block time expressed in " + UNIX_EPOCH_TIME},
                     {RPCResult::Type::NUM, "nonce", "The nonce"},
                     {RPCResult::Type::STR_HEX, "bits", "The bits"},
                     {RPCResult::Type::NUM, "difficulty", "The difficulty"},
                     {RPCResult::Type::STR_HEX, "chainwork",
                      "Expected number of hashes required to produce the chain "
                      "up to this block (in hex)"},
                     {RPCResult::Type::NUM, "nTx",
                      "The number of transactions in the block"},
                     {RPCResult::Type::STR_HEX, "previousblockhash",
                      /* optional */ true,
                      "The hash of the previous block (if available)"},
                     {RPCResult::Type::STR_HEX, "nextblockhash",
                      /* optional */ true,
                      "The hash of the next block (if available)"},
                 }},
             RPCResult{"for verbosity = 2",
                       RPCResult::Type::OBJ,
                       "",
                       "",
                       {
                           {RPCResult::Type::ELISION, "",
                            "Same output as verbosity = 1"},
                           {RPCResult::Type::ARR,
                            "tx",
                            "",
                            {
                                {RPCResult::Type::OBJ,
                                 "",
                                 "",
                                 {
                                     {RPCResult::Type::ELISION, "",
                                      "The transactions in the format of the "
                                      "getrawtransaction RPC. Different from "
                                      "verbosity = 1 \"tx\" result"},
                                 }},
                            }},
                       }},
         },
         RPCExamples{
             HelpExampleCli("getblock", "\"00000000c937983704a73af28acdec37b049d"
                                        "214adbda81d7e2a3dd146f6ed09\"") +
             HelpExampleRpc("getblock", "\"00000000c937983704a73af28acdec37b049d"
                                        "214adbda81d7e2a3dd146f6ed09\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             BlockHash hash(ParseHashV(request.params[0], "blockhash"));
 
             int verbosity = 1;
             if (!request.params[1].isNull()) {
                 if (request.params[1].isNum()) {
                     verbosity = request.params[1].get_int();
                 } else {
                     verbosity = request.params[1].get_bool() ? 1 : 0;
                 }
             }
 
             CBlock block;
             const CBlockIndex *pblockindex;
             const CBlockIndex *tip;
             {
                 ChainstateManager &chainman =
                     EnsureAnyChainman(request.context);
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 tip = chainman.ActiveTip();
 
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
 
                 block = GetBlockChecked(config, pblockindex);
             }
 
             if (verbosity <= 0) {
                 CDataStream ssBlock(SER_NETWORK,
                                     PROTOCOL_VERSION | RPCSerializationFlags());
                 ssBlock << block;
                 std::string strHex = HexStr(ssBlock);
                 return strHex;
             }
 
             return blockToJSON(block, tip, pblockindex, verbosity >= 2);
         },
     };
 }
 
 static RPCHelpMan pruneblockchain() {
     return RPCHelpMan{
         "pruneblockchain",
         "",
         {
             {"height", RPCArg::Type::NUM, RPCArg::Optional::NO,
              "The block height to prune up to. May be set to a discrete "
              "height, or to a " +
                  UNIX_EPOCH_TIME +
                  "\n"
                  "                  to prune blocks whose block time is at "
                  "least 2 hours older than the provided timestamp."},
         },
         RPCResult{RPCResult::Type::NUM, "", "Height of the last block pruned"},
         RPCExamples{HelpExampleCli("pruneblockchain", "1000") +
                     HelpExampleRpc("pruneblockchain", "1000")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             if (!fPruneMode) {
                 throw JSONRPCError(
                     RPC_MISC_ERROR,
                     "Cannot prune blocks because node is not in prune mode.");
             }
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             CChainState &active_chainstate = chainman.ActiveChainstate();
             CChain &active_chain = active_chainstate.m_chain;
 
             int heightParam = request.params[0].get_int();
             if (heightParam < 0) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,
                                    "Negative block height.");
             }
 
             // Height value more than a billion is too high to be a block
             // height, and too low to be a block time (corresponds to timestamp
             // from Sep 2001).
             if (heightParam > 1000000000) {
                 // Add a 2 hour buffer to include blocks which might have had
                 // old timestamps
                 CBlockIndex *pindex = active_chain.FindEarliestAtLeast(
                     heightParam - TIMESTAMP_WINDOW, 0);
                 if (!pindex) {
                     throw JSONRPCError(RPC_INVALID_PARAMETER,
                                        "Could not find block with at least the "
                                        "specified timestamp.");
                 }
                 heightParam = pindex->nHeight;
             }
 
             unsigned int height = (unsigned int)heightParam;
             unsigned int chainHeight = (unsigned int)active_chain.Height();
             if (chainHeight < config.GetChainParams().PruneAfterHeight()) {
                 throw JSONRPCError(RPC_MISC_ERROR,
                                    "Blockchain is too short for pruning.");
             } else if (height > chainHeight) {
                 throw JSONRPCError(
                     RPC_INVALID_PARAMETER,
                     "Blockchain is shorter than the attempted prune height.");
             } else if (height > chainHeight - MIN_BLOCKS_TO_KEEP) {
                 LogPrint(BCLog::RPC,
                          "Attempt to prune blocks close to the tip. "
                          "Retaining the minimum number of blocks.\n");
                 height = chainHeight - MIN_BLOCKS_TO_KEEP;
             }
 
             PruneBlockFilesManual(active_chainstate, height);
             const CBlockIndex *block = active_chain.Tip();
             CHECK_NONFATAL(block);
             while (block->pprev && (block->pprev->nStatus.hasData())) {
                 block = block->pprev;
             }
             return uint64_t(block->nHeight);
         },
     };
 }
 
 static CoinStatsHashType ParseHashType(const std::string &hash_type_input) {
     if (hash_type_input == "hash_serialized") {
         return CoinStatsHashType::HASH_SERIALIZED;
     } else if (hash_type_input == "muhash") {
         return CoinStatsHashType::MUHASH;
     } else if (hash_type_input == "none") {
         return CoinStatsHashType::NONE;
     } else {
         throw JSONRPCError(
             RPC_INVALID_PARAMETER,
             strprintf("%s is not a valid hash_type", hash_type_input));
     }
 }
 
 static RPCHelpMan gettxoutsetinfo() {
     return RPCHelpMan{
         "gettxoutsetinfo",
         "Returns statistics about the unspent transaction output set.\n"
         "Note this call may take some time if you are not using "
         "coinstatsindex.\n",
         {
             {"hash_type", RPCArg::Type::STR, /* default */ "hash_serialized",
              "Which UTXO set hash should be calculated. Options: "
              "'hash_serialized' (the legacy algorithm), 'muhash', 'none'."},
             {"hash_or_height",
              RPCArg::Type::NUM,
              RPCArg::Optional::OMITTED,
              "The block hash or height of the target height (only available "
              "with coinstatsindex).",
              "",
              {"", "string or numeric"}},
+            {"use_index", RPCArg::Type::BOOL, /* default */ "true",
+             "Use coinstatsindex, if available."},
         },
         RPCResult{
             RPCResult::Type::OBJ,
             "",
             "",
             {
                 {RPCResult::Type::NUM, "height",
                  "The current block height (index)"},
                 {RPCResult::Type::STR_HEX, "bestblock",
                  "The hash of the block at the tip of the chain"},
                 {RPCResult::Type::NUM, "txouts",
                  "The number of unspent transaction outputs"},
                 {RPCResult::Type::NUM, "bogosize",
                  "Database-independent, meaningless metric indicating "
                  "the UTXO set size"},
                 {RPCResult::Type::STR_HEX, "hash_serialized",
                  /* optional */ true,
                  "The serialized hash (only present if 'hash_serialized' "
                  "hash_type is chosen)"},
                 {RPCResult::Type::STR_HEX, "muhash", /* optional */ true,
                  "The serialized hash (only present if 'muhash' "
                  "hash_type is chosen)"},
                 {RPCResult::Type::NUM, "transactions",
                  "The number of transactions with unspent outputs (not "
                  "available when coinstatsindex is used)"},
                 {RPCResult::Type::NUM, "disk_size",
                  "The estimated size of the chainstate on disk (not "
                  "available when coinstatsindex is used)"},
                 {RPCResult::Type::STR_AMOUNT, "total_amount",
                  "The total amount"},
                 {RPCResult::Type::STR_AMOUNT, "total_unspendable_amount",
                  "The total amount of coins permanently excluded from the UTXO "
                  "set (only available if coinstatsindex is used)"},
                 {RPCResult::Type::OBJ,
                  "block_info",
                  "Info on amounts in the block at this block height (only "
                  "available if coinstatsindex is used)",
                  {{RPCResult::Type::STR_AMOUNT, "prevout_spent", ""},
                   {RPCResult::Type::STR_AMOUNT, "coinbase", ""},
                   {RPCResult::Type::STR_AMOUNT, "new_outputs_ex_coinbase", ""},
                   {RPCResult::Type::STR_AMOUNT, "unspendable", ""},
                   {RPCResult::Type::OBJ,
                    "unspendables",
                    "Detailed view of the unspendable categories",
                    {
                        {RPCResult::Type::STR_AMOUNT, "genesis_block", ""},
                        {RPCResult::Type::STR_AMOUNT, "bip30",
                         "Transactions overridden by duplicates (no longer "
                         "possible with BIP30)"},
                        {RPCResult::Type::STR_AMOUNT, "scripts",
                         "Amounts sent to scripts that are unspendable (for "
                         "example OP_RETURN outputs)"},
                        {RPCResult::Type::STR_AMOUNT, "unclaimed_rewards",
                         "Fee rewards that miners did not claim in their "
                         "coinbase transaction"},
                    }}}},
             }},
         RPCExamples{
             HelpExampleCli("gettxoutsetinfo", "") +
             HelpExampleCli("gettxoutsetinfo", R"("none")") +
             HelpExampleCli("gettxoutsetinfo", R"("none" 1000)") +
             HelpExampleCli(
                 "gettxoutsetinfo",
                 R"("none" '"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"')") +
             HelpExampleRpc("gettxoutsetinfo", "") +
             HelpExampleRpc("gettxoutsetinfo", R"("none")") +
             HelpExampleRpc("gettxoutsetinfo", R"("none", 1000)") +
             HelpExampleRpc(
                 "gettxoutsetinfo",
                 R"("none", "00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09")")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             UniValue ret(UniValue::VOBJ);
 
             CBlockIndex *pindex{nullptr};
             const CoinStatsHashType hash_type{
                 request.params[0].isNull()
                     ? CoinStatsHashType::HASH_SERIALIZED
                     : ParseHashType(request.params[0].get_str())};
             CCoinsStats stats{hash_type};
+            stats.index_requested =
+                request.params[2].isNull() || request.params[2].get_bool();
 
             NodeContext &node = EnsureAnyNodeContext(request.context);
             ChainstateManager &chainman = EnsureChainman(node);
             CChainState &active_chainstate = chainman.ActiveChainstate();
             active_chainstate.ForceFlushStateToDisk();
 
             CCoinsView *coins_view;
             BlockManager *blockman;
             {
                 LOCK(::cs_main);
                 coins_view = &active_chainstate.CoinsDB();
                 blockman = &active_chainstate.m_blockman;
                 pindex = blockman->LookupBlockIndex(coins_view->GetBestBlock());
             }
 
             if (!request.params[1].isNull()) {
                 if (!g_coin_stats_index) {
                     throw JSONRPCError(RPC_INVALID_PARAMETER,
                                        "Querying specific block heights "
                                        "requires coinstatsindex");
                 }
 
                 pindex = ParseHashOrHeight(request.params[1], chainman);
             }
 
             if (GetUTXOStats(coins_view, *blockman, stats,
                              node.rpc_interruption_point, pindex)) {
                 ret.pushKV("height", int64_t(stats.nHeight));
                 ret.pushKV("bestblock", stats.hashBlock.GetHex());
                 ret.pushKV("txouts", int64_t(stats.nTransactionOutputs));
                 ret.pushKV("bogosize", int64_t(stats.nBogoSize));
                 if (hash_type == CoinStatsHashType::HASH_SERIALIZED) {
                     ret.pushKV("hash_serialized",
                                stats.hashSerialized.GetHex());
                 }
                 if (hash_type == CoinStatsHashType::MUHASH) {
                     ret.pushKV("muhash", stats.hashSerialized.GetHex());
                 }
                 ret.pushKV("total_amount", stats.nTotalAmount);
-                if (!stats.from_index) {
+                if (!stats.index_used) {
                     ret.pushKV("transactions",
                                static_cast<int64_t>(stats.nTransactions));
                     ret.pushKV("disk_size", stats.nDiskSize);
                 } else {
                     ret.pushKV("total_unspendable_amount",
                                stats.total_unspendable_amount);
 
                     CCoinsStats prev_stats{hash_type};
 
                     if (pindex->nHeight > 0) {
                         GetUTXOStats(
                             coins_view,
                             WITH_LOCK(::cs_main,
                                       return std::ref(g_chainman.m_blockman)),
                             prev_stats, node.rpc_interruption_point,
                             pindex->pprev);
                     }
 
                     UniValue block_info(UniValue::VOBJ);
                     block_info.pushKV(
                         "prevout_spent",
                         stats.total_prevout_spent_amount -
                             prev_stats.total_prevout_spent_amount);
                     block_info.pushKV("coinbase",
                                       stats.total_coinbase_amount -
                                           prev_stats.total_coinbase_amount);
                     block_info.pushKV(
                         "new_outputs_ex_coinbase",
                         stats.total_new_outputs_ex_coinbase_amount -
                             prev_stats.total_new_outputs_ex_coinbase_amount);
                     block_info.pushKV("unspendable",
                                       stats.total_unspendable_amount -
                                           prev_stats.total_unspendable_amount);
 
                     UniValue unspendables(UniValue::VOBJ);
                     unspendables.pushKV(
                         "genesis_block",
                         stats.total_unspendables_genesis_block -
                             prev_stats.total_unspendables_genesis_block);
                     unspendables.pushKV(
                         "bip30", stats.total_unspendables_bip30 -
                                      prev_stats.total_unspendables_bip30);
                     unspendables.pushKV(
                         "scripts", stats.total_unspendables_scripts -
                                        prev_stats.total_unspendables_scripts);
                     unspendables.pushKV(
                         "unclaimed_rewards",
                         stats.total_unspendables_unclaimed_rewards -
                             prev_stats.total_unspendables_unclaimed_rewards);
                     block_info.pushKV("unspendables", unspendables);
 
                     ret.pushKV("block_info", block_info);
                 }
             } else {
                 if (g_coin_stats_index) {
                     const IndexSummary summary{
                         g_coin_stats_index->GetSummary()};
 
                     if (!summary.synced) {
                         throw JSONRPCError(
                             RPC_INTERNAL_ERROR,
                             strprintf("Unable to read UTXO set because "
                                       "coinstatsindex is still syncing. "
                                       "Current height: %d",
                                       summary.best_block_height));
                     }
                 }
                 throw JSONRPCError(RPC_INTERNAL_ERROR,
                                    "Unable to read UTXO set");
             }
             return ret;
         },
     };
 }
 
 RPCHelpMan gettxout() {
     return RPCHelpMan{
         "gettxout",
         "Returns details about an unspent transaction output.\n",
         {
             {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The transaction id"},
             {"n", RPCArg::Type::NUM, RPCArg::Optional::NO, "vout number"},
             {"include_mempool", RPCArg::Type::BOOL, /* default */ "true",
              "Whether to include the mempool. Note that an unspent output that "
              "is spent in the mempool won't appear."},
         },
         {
             RPCResult{"If the UTXO was not found", RPCResult::Type::NONE, "",
                       ""},
             RPCResult{
                 "Otherwise",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::STR_HEX, "bestblock",
                      "The hash of the block at the tip of the chain"},
                     {RPCResult::Type::NUM, "confirmations",
                      "The number of confirmations"},
                     {RPCResult::Type::STR_AMOUNT, "value",
                      "The transaction value in " + Currency::get().ticker},
                     {RPCResult::Type::OBJ,
                      "scriptPubKey",
                      "",
                      {
                          {RPCResult::Type::STR_HEX, "asm", ""},
                          {RPCResult::Type::STR_HEX, "hex", ""},
                          {RPCResult::Type::NUM, "reqSigs",
                           "Number of required signatures"},
                          {RPCResult::Type::STR_HEX, "type",
                           "The type, eg pubkeyhash"},
                          {RPCResult::Type::ARR,
                           "addresses",
                           "array of eCash addresses",
                           {{RPCResult::Type::STR, "address", "eCash address"}}},
                      }},
                     {RPCResult::Type::BOOL, "coinbase", "Coinbase or not"},
                 }},
         },
         RPCExamples{"\nGet unspent transactions\n" +
                     HelpExampleCli("listunspent", "") + "\nView the details\n" +
                     HelpExampleCli("gettxout", "\"txid\" 1") +
                     "\nAs a JSON-RPC call\n" +
                     HelpExampleRpc("gettxout", "\"txid\", 1")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             NodeContext &node = EnsureAnyNodeContext(request.context);
             ChainstateManager &chainman = EnsureChainman(node);
             LOCK(cs_main);
 
             UniValue ret(UniValue::VOBJ);
 
             TxId txid(ParseHashV(request.params[0], "txid"));
             int n = request.params[1].get_int();
             COutPoint out(txid, n);
             bool fMempool = true;
             if (!request.params[2].isNull()) {
                 fMempool = request.params[2].get_bool();
             }
 
             Coin coin;
             CChainState &active_chainstate = chainman.ActiveChainstate();
             CCoinsViewCache *coins_view = &active_chainstate.CoinsTip();
 
             if (fMempool) {
                 const CTxMemPool &mempool = EnsureMemPool(node);
                 LOCK(mempool.cs);
                 CCoinsViewMemPool view(coins_view, mempool);
                 if (!view.GetCoin(out, coin) || mempool.isSpent(out)) {
                     return NullUniValue;
                 }
             } else {
                 if (!coins_view->GetCoin(out, coin)) {
                     return NullUniValue;
                 }
             }
 
             const CBlockIndex *pindex =
                 active_chainstate.m_blockman.LookupBlockIndex(
                     coins_view->GetBestBlock());
             ret.pushKV("bestblock", pindex->GetBlockHash().GetHex());
             if (coin.GetHeight() == MEMPOOL_HEIGHT) {
                 ret.pushKV("confirmations", 0);
             } else {
                 ret.pushKV("confirmations",
                            int64_t(pindex->nHeight - coin.GetHeight() + 1));
             }
             ret.pushKV("value", coin.GetTxOut().nValue);
             UniValue o(UniValue::VOBJ);
             ScriptPubKeyToUniv(coin.GetTxOut().scriptPubKey, o, true);
             ret.pushKV("scriptPubKey", o);
             ret.pushKV("coinbase", coin.IsCoinBase());
 
             return ret;
         },
     };
 }
 
 static RPCHelpMan verifychain() {
     return RPCHelpMan{
         "verifychain",
         "Verifies blockchain database.\n",
         {
             {"checklevel", RPCArg::Type::NUM,
              /* default */ strprintf("%d, range=0-4", DEFAULT_CHECKLEVEL),
              strprintf("How thorough the block verification is:\n - %s",
                        Join(CHECKLEVEL_DOC, "\n- "))},
             {"nblocks", RPCArg::Type::NUM,
              /* default */ strprintf("%d, 0=all", DEFAULT_CHECKBLOCKS),
              "The number of blocks to check."},
         },
         RPCResult{RPCResult::Type::BOOL, "", "Verified or not"},
         RPCExamples{HelpExampleCli("verifychain", "") +
                     HelpExampleRpc("verifychain", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const int check_level(request.params[0].isNull()
                                       ? DEFAULT_CHECKLEVEL
                                       : request.params[0].get_int());
             const int check_depth{request.params[1].isNull()
                                       ? DEFAULT_CHECKBLOCKS
                                       : request.params[1].get_int()};
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
 
             CChainState &active_chainstate = chainman.ActiveChainstate();
             return CVerifyDB().VerifyDB(active_chainstate, config,
                                         active_chainstate.CoinsTip(),
                                         check_level, check_depth);
         },
     };
 }
 
 static void BIP9SoftForkDescPushBack(const CBlockIndex *active_chain_tip,
                                      UniValue &softforks,
                                      const Consensus::Params &consensusParams,
                                      Consensus::DeploymentPos id)
     EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
     // For BIP9 deployments.
     // Deployments (e.g. testdummy) with timeout value before Jan 1, 2009 are
     // hidden. A timeout value of 0 guarantees a softfork will never be
     // activated. This is used when merging logic to implement a proposed
     // softfork without a specified deployment schedule.
     if (consensusParams.vDeployments[id].nTimeout <= 1230768000) {
         return;
     }
 
     UniValue bip9(UniValue::VOBJ);
     const ThresholdState thresholdState = VersionBitsState(
         active_chain_tip, consensusParams, id, versionbitscache);
     switch (thresholdState) {
         case ThresholdState::DEFINED:
             bip9.pushKV("status", "defined");
             break;
         case ThresholdState::STARTED:
             bip9.pushKV("status", "started");
             break;
         case ThresholdState::LOCKED_IN:
             bip9.pushKV("status", "locked_in");
             break;
         case ThresholdState::ACTIVE:
             bip9.pushKV("status", "active");
             break;
         case ThresholdState::FAILED:
             bip9.pushKV("status", "failed");
             break;
     }
     if (ThresholdState::STARTED == thresholdState) {
         bip9.pushKV("bit", consensusParams.vDeployments[id].bit);
     }
     bip9.pushKV("start_time", consensusParams.vDeployments[id].nStartTime);
     bip9.pushKV("timeout", consensusParams.vDeployments[id].nTimeout);
     int64_t since_height = VersionBitsStateSinceHeight(
         active_chain_tip, consensusParams, id, versionbitscache);
     bip9.pushKV("since", since_height);
     if (ThresholdState::STARTED == thresholdState) {
         UniValue statsUV(UniValue::VOBJ);
         BIP9Stats statsStruct =
             VersionBitsStatistics(active_chain_tip, consensusParams, id);
         statsUV.pushKV("period", statsStruct.period);
         statsUV.pushKV("threshold", statsStruct.threshold);
         statsUV.pushKV("elapsed", statsStruct.elapsed);
         statsUV.pushKV("count", statsStruct.count);
         statsUV.pushKV("possible", statsStruct.possible);
         bip9.pushKV("statistics", statsUV);
     }
 
     UniValue rv(UniValue::VOBJ);
     rv.pushKV("type", "bip9");
     rv.pushKV("bip9", bip9);
     if (ThresholdState::ACTIVE == thresholdState) {
         rv.pushKV("height", since_height);
     }
     rv.pushKV("active", ThresholdState::ACTIVE == thresholdState);
 
     softforks.pushKV(VersionBitsDeploymentInfo[id].name, rv);
 }
 
 RPCHelpMan getblockchaininfo() {
     return RPCHelpMan{
         "getblockchaininfo",
         "Returns an object containing various state info regarding blockchain "
         "processing.\n",
         {},
         RPCResult{
             RPCResult::Type::OBJ,
             "",
             "",
             {
                 {RPCResult::Type::STR, "chain",
                  "current network name (main, test, regtest)"},
                 {RPCResult::Type::NUM, "blocks",
                  "the height of the most-work fully-validated chain. The "
                  "genesis block has height 0"},
                 {RPCResult::Type::NUM, "headers",
                  "the current number of headers we have validated"},
                 {RPCResult::Type::STR, "bestblockhash",
                  "the hash of the currently best block"},
                 {RPCResult::Type::NUM, "difficulty", "the current difficulty"},
                 {RPCResult::Type::NUM, "mediantime",
                  "median time for the current best block"},
                 {RPCResult::Type::NUM, "verificationprogress",
                  "estimate of verification progress [0..1]"},
                 {RPCResult::Type::BOOL, "initialblockdownload",
                  "(debug information) estimate of whether this node is in "
                  "Initial Block Download mode"},
                 {RPCResult::Type::STR_HEX, "chainwork",
                  "total amount of work in active chain, in hexadecimal"},
                 {RPCResult::Type::NUM, "size_on_disk",
                  "the estimated size of the block and undo files on disk"},
                 {RPCResult::Type::BOOL, "pruned",
                  "if the blocks are subject to pruning"},
                 {RPCResult::Type::NUM, "pruneheight",
                  "lowest-height complete block stored (only present if pruning "
                  "is enabled)"},
                 {RPCResult::Type::BOOL, "automatic_pruning",
                  "whether automatic pruning is enabled (only present if "
                  "pruning is enabled)"},
                 {RPCResult::Type::NUM, "prune_target_size",
                  "the target size used by pruning (only present if automatic "
                  "pruning is enabled)"},
                 {RPCResult::Type::OBJ_DYN,
                  "softforks",
                  "status of softforks",
                  {
                      {RPCResult::Type::OBJ,
                       "xxxx",
                       "name of the softfork",
                       {
                           {RPCResult::Type::STR, "type",
                            "one of \"buried\", \"bip9\""},
                           {RPCResult::Type::OBJ,
                            "bip9",
                            "status of bip9 softforks (only for \"bip9\" type)",
                            {
                                {RPCResult::Type::STR, "status",
                                 "one of \"defined\", \"started\", "
                                 "\"locked_in\", \"active\", \"failed\""},
                                {RPCResult::Type::NUM, "bit",
                                 "the bit (0-28) in the block version field "
                                 "used to signal this softfork (only for "
                                 "\"started\" status)"},
                                {RPCResult::Type::NUM_TIME, "start_time",
                                 "the minimum median time past of a block at "
                                 "which the bit gains its meaning"},
                                {RPCResult::Type::NUM_TIME, "timeout",
                                 "the median time past of a block at which the "
                                 "deployment is considered failed if not yet "
                                 "locked in"},
                                {RPCResult::Type::NUM, "since",
                                 "height of the first block to which the status "
                                 "applies"},
                                {RPCResult::Type::OBJ,
                                 "statistics",
                                 "numeric statistics about BIP9 signalling for "
                                 "a softfork",
                                 {
                                     {RPCResult::Type::NUM, "period",
                                      "the length in blocks of the BIP9 "
                                      "signalling period"},
                                     {RPCResult::Type::NUM, "threshold",
                                      "the number of blocks with the version "
                                      "bit set required to activate the "
                                      "feature"},
                                     {RPCResult::Type::NUM, "elapsed",
                                      "the number of blocks elapsed since the "
                                      "beginning of the current period"},
                                     {RPCResult::Type::NUM, "count",
                                      "the number of blocks with the version "
                                      "bit set in the current period"},
                                     {RPCResult::Type::BOOL, "possible",
                                      "returns false if there are not enough "
                                      "blocks left in this period to pass "
                                      "activation threshold"},
                                 }},
                            }},
                           {RPCResult::Type::NUM, "height",
                            "height of the first block which the rules are or "
                            "will be enforced (only for \"buried\" type, or "
                            "\"bip9\" type with \"active\" status)"},
                           {RPCResult::Type::BOOL, "active",
                            "true if the rules are enforced for the mempool and "
                            "the next block"},
                       }},
                  }},
                 {RPCResult::Type::STR, "warnings",
                  "any network and blockchain warnings"},
             }},
         RPCExamples{HelpExampleCli("getblockchaininfo", "") +
                     HelpExampleRpc("getblockchaininfo", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const CChainParams &chainparams = config.GetChainParams();
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             CChainState &active_chainstate = chainman.ActiveChainstate();
 
             const CBlockIndex *tip = active_chainstate.m_chain.Tip();
             CHECK_NONFATAL(tip);
             const int height = tip->nHeight;
 
             UniValue obj(UniValue::VOBJ);
             obj.pushKV("chain", chainparams.NetworkIDString());
             obj.pushKV("blocks", height);
             obj.pushKV("headers",
                        pindexBestHeader ? pindexBestHeader->nHeight : -1);
             obj.pushKV("bestblockhash", tip->GetBlockHash().GetHex());
             obj.pushKV("difficulty", double(GetDifficulty(tip)));
             obj.pushKV("mediantime", int64_t(tip->GetMedianTimePast()));
             obj.pushKV("verificationprogress",
                        GuessVerificationProgress(Params().TxData(), tip));
             obj.pushKV("initialblockdownload",
                        active_chainstate.IsInitialBlockDownload());
             obj.pushKV("chainwork", tip->nChainWork.GetHex());
             obj.pushKV("size_on_disk", CalculateCurrentUsage());
             obj.pushKV("pruned", fPruneMode);
 
             if (fPruneMode) {
                 const CBlockIndex *block = tip;
                 CHECK_NONFATAL(block);
                 while (block->pprev && (block->pprev->nStatus.hasData())) {
                     block = block->pprev;
                 }
 
                 obj.pushKV("pruneheight", block->nHeight);
 
                 // if 0, execution bypasses the whole if block.
                 bool automatic_pruning = (gArgs.GetArg("-prune", 0) != 1);
                 obj.pushKV("automatic_pruning", automatic_pruning);
                 if (automatic_pruning) {
                     obj.pushKV("prune_target_size", nPruneTarget);
                 }
             }
 
             UniValue softforks(UniValue::VOBJ);
             for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS;
                  i++) {
                 BIP9SoftForkDescPushBack(tip, softforks,
                                          chainparams.GetConsensus(),
                                          Consensus::DeploymentPos(i));
             }
             obj.pushKV("softforks", softforks);
 
             obj.pushKV("warnings", GetWarnings(false).original);
             return obj;
         },
     };
 }
 
 /** Comparison function for sorting the getchaintips heads.  */
 struct CompareBlocksByHeight {
     bool operator()(const CBlockIndex *a, const CBlockIndex *b) const {
         // Make sure that unequal blocks with the same height do not compare
         // equal. Use the pointers themselves to make a distinction.
         if (a->nHeight != b->nHeight) {
             return (a->nHeight > b->nHeight);
         }
 
         return a < b;
     }
 };
 
 static RPCHelpMan getchaintips() {
     return RPCHelpMan{
         "getchaintips",
         "Return information about all known tips in the block tree, including "
         "the main chain as well as orphaned branches.\n",
         {},
         RPCResult{
             RPCResult::Type::ARR,
             "",
             "",
             {{RPCResult::Type::OBJ,
               "",
               "",
               {
                   {RPCResult::Type::NUM, "height", "height of the chain tip"},
                   {RPCResult::Type::STR_HEX, "hash", "block hash of the tip"},
                   {RPCResult::Type::NUM, "branchlen",
                    "zero for main chain, otherwise length of branch connecting "
                    "the tip to the main chain"},
                   {RPCResult::Type::STR, "status",
                    "status of the chain, \"active\" for the main chain\n"
                    "Possible values for status:\n"
                    "1.  \"invalid\"               This branch contains at "
                    "least one invalid block\n"
                    "2.  \"parked\"                This branch contains at "
                    "least one parked block\n"
                    "3.  \"headers-only\"          Not all blocks for this "
                    "branch are available, but the headers are valid\n"
                    "4.  \"valid-headers\"         All blocks are available for "
                    "this branch, but they were never fully validated\n"
                    "5.  \"valid-fork\"            This branch is not part of "
                    "the active chain, but is fully validated\n"
                    "6.  \"active\"                This is the tip of the "
                    "active main chain, which is certainly valid"},
               }}}},
         RPCExamples{HelpExampleCli("getchaintips", "") +
                     HelpExampleRpc("getchaintips", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             CChain &active_chain = chainman.ActiveChain();
 
             /**
              * Idea: The set of chain tips is the active chain tip, plus orphan
              * blocks which do not have another orphan building off of them.
              * Algorithm:
              *  - Make one pass through BlockIndex(), picking out the orphan
              * blocks, and also storing a set of the orphan block's pprev
              * pointers.
              *  - Iterate through the orphan blocks. If the block isn't pointed
              * to by another orphan, it is a chain tip.
              *  - Add the active chain tip
              */
             std::set<const CBlockIndex *, CompareBlocksByHeight> setTips;
             std::set<const CBlockIndex *> setOrphans;
             std::set<const CBlockIndex *> setPrevs;
 
             for (const std::pair<const BlockHash, CBlockIndex *> &item :
                  chainman.BlockIndex()) {
                 if (!active_chain.Contains(item.second)) {
                     setOrphans.insert(item.second);
                     setPrevs.insert(item.second->pprev);
                 }
             }
 
             for (std::set<const CBlockIndex *>::iterator it =
                      setOrphans.begin();
                  it != setOrphans.end(); ++it) {
                 if (setPrevs.erase(*it) == 0) {
                     setTips.insert(*it);
                 }
             }
 
             // Always report the currently active tip.
             setTips.insert(active_chain.Tip());
 
             /* Construct the output array.  */
             UniValue res(UniValue::VARR);
             for (const CBlockIndex *block : setTips) {
                 UniValue obj(UniValue::VOBJ);
                 obj.pushKV("height", block->nHeight);
                 obj.pushKV("hash", block->phashBlock->GetHex());
 
                 const int branchLen =
                     block->nHeight - active_chain.FindFork(block)->nHeight;
                 obj.pushKV("branchlen", branchLen);
 
                 std::string status;
                 if (active_chain.Contains(block)) {
                     // This block is part of the currently active chain.
                     status = "active";
                 } else if (block->nStatus.isInvalid()) {
                     // This block or one of its ancestors is invalid.
                     status = "invalid";
                 } else if (block->nStatus.isOnParkedChain()) {
                     // This block or one of its ancestors is parked.
                     status = "parked";
                 } else if (!block->HaveTxsDownloaded()) {
                     // This block cannot be connected because full block data
                     // for it or one of its parents is missing.
                     status = "headers-only";
                 } else if (block->IsValid(BlockValidity::SCRIPTS)) {
                     // This block is fully validated, but no longer part of the
                     // active chain. It was probably the active block once, but
                     // was reorganized.
                     status = "valid-fork";
                 } else if (block->IsValid(BlockValidity::TREE)) {
                     // The headers for this block are valid, but it has not been
                     // validated. It was probably never part of the most-work
                     // chain.
                     status = "valid-headers";
                 } else {
                     // No clue.
                     status = "unknown";
                 }
                 obj.pushKV("status", status);
 
                 res.push_back(obj);
             }
 
             return res;
         },
     };
 }
 
 UniValue MempoolInfoToJSON(const CTxMemPool &pool) {
     // Make sure this call is atomic in the pool.
     LOCK(pool.cs);
     UniValue ret(UniValue::VOBJ);
     ret.pushKV("loaded", pool.IsLoaded());
     ret.pushKV("size", (int64_t)pool.size());
     ret.pushKV("bytes", (int64_t)pool.GetTotalTxSize());
     ret.pushKV("usage", (int64_t)pool.DynamicMemoryUsage());
     size_t maxmempool =
         gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
     ret.pushKV("maxmempool", (int64_t)maxmempool);
     ret.pushKV(
         "mempoolminfee",
         std::max(pool.GetMinFee(maxmempool), ::minRelayTxFee).GetFeePerK());
     ret.pushKV("minrelaytxfee", ::minRelayTxFee.GetFeePerK());
     ret.pushKV("unbroadcastcount", uint64_t{pool.GetUnbroadcastTxs().size()});
     return ret;
 }
 
 static RPCHelpMan getmempoolinfo() {
     return RPCHelpMan{
         "getmempoolinfo",
         "Returns details on the active state of the TX memory pool.\n",
         {},
         RPCResult{
             RPCResult::Type::OBJ,
             "",
             "",
             {
                 {RPCResult::Type::BOOL, "loaded",
                  "True if the mempool is fully loaded"},
                 {RPCResult::Type::NUM, "size", "Current tx count"},
                 {RPCResult::Type::NUM, "bytes", "Sum of all transaction sizes"},
                 {RPCResult::Type::NUM, "usage",
                  "Total memory usage for the mempool"},
                 {RPCResult::Type::NUM, "maxmempool",
                  "Maximum memory usage for the mempool"},
                 {RPCResult::Type::STR_AMOUNT, "mempoolminfee",
                  "Minimum fee rate in " + Currency::get().ticker +
                      "/kB for tx to be accepted. Is the maximum of "
                      "minrelaytxfee and minimum mempool fee"},
                 {RPCResult::Type::STR_AMOUNT, "minrelaytxfee",
                  "Current minimum relay fee for transactions"},
                 {RPCResult::Type::NUM, "unbroadcastcount",
                  "Current number of transactions that haven't passed initial "
                  "broadcast yet"},
             }},
         RPCExamples{HelpExampleCli("getmempoolinfo", "") +
                     HelpExampleRpc("getmempoolinfo", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             return MempoolInfoToJSON(EnsureAnyMemPool(request.context));
         },
     };
 }
 
 static RPCHelpMan preciousblock() {
     return RPCHelpMan{
         "preciousblock",
         "Treats a block as if it were received before others with the same "
         "work.\n"
         "\nA later preciousblock call can override the effect of an earlier "
         "one.\n"
         "\nThe effects of preciousblock are not retained across restarts.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to mark as precious"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("preciousblock", "\"blockhash\"") +
                     HelpExampleRpc("preciousblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             BlockHash hash(ParseHashV(request.params[0], "blockhash"));
             CBlockIndex *pblockindex;
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             {
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
             }
 
             BlockValidationState state;
             chainman.ActiveChainstate().PreciousBlock(config, state,
                                                       pblockindex);
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());
             }
 
             return NullUniValue;
         },
     };
 }
 
 RPCHelpMan finalizeblock() {
     return RPCHelpMan{
         "finalizeblock",
         "Treats a block as final. It cannot be reorged. Any chain\n"
         "that does not contain this block is invalid. Used on a less\n"
         "work chain, it can effectively PUT YOU OUT OF CONSENSUS.\n"
         "USE WITH CAUTION!\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to mark as invalid"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("finalizeblock", "\"blockhash\"") +
                     HelpExampleRpc("finalizeblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             std::string strHash = request.params[0].get_str();
             BlockHash hash(uint256S(strHash));
             BlockValidationState state;
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             CBlockIndex *pblockindex = nullptr;
             {
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
             } // end of locked cs_main scope
 
             chainman.ActiveChainstate().FinalizeBlock(config, state,
                                                       pblockindex);
 
             if (state.IsValid()) {
                 chainman.ActiveChainstate().ActivateBestChain(config, state);
             }
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.ToString());
             }
 
             return NullUniValue;
         },
     };
 }
 
 static RPCHelpMan invalidateblock() {
     return RPCHelpMan{
         "invalidateblock",
         "Permanently marks a block as invalid, as if it violated a consensus "
         "rule.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to mark as invalid"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("invalidateblock", "\"blockhash\"") +
                     HelpExampleRpc("invalidateblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const BlockHash hash(ParseHashV(request.params[0], "blockhash"));
             BlockValidationState state;
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             CBlockIndex *pblockindex;
             {
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
             }
             chainman.ActiveChainstate().InvalidateBlock(config, state,
                                                         pblockindex);
 
             if (state.IsValid()) {
                 chainman.ActiveChainstate().ActivateBestChain(config, state);
             }
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.ToString());
             }
 
             return NullUniValue;
         },
     };
 }
 
 RPCHelpMan parkblock() {
     return RPCHelpMan{
         "parkblock",
         "Marks a block as parked.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to park"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("parkblock", "\"blockhash\"") +
                     HelpExampleRpc("parkblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const std::string strHash = request.params[0].get_str();
             const BlockHash hash(uint256S(strHash));
             BlockValidationState state;
 
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             CBlockIndex *pblockindex = nullptr;
             {
                 LOCK(cs_main);
                 pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
             }
             chainman.ActiveChainstate().ParkBlock(config, state, pblockindex);
 
             if (state.IsValid()) {
                 chainman.ActiveChainstate().ActivateBestChain(config, state);
             }
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());
             }
 
             return NullUniValue;
         },
     };
 }
 
 static RPCHelpMan reconsiderblock() {
     return RPCHelpMan{
         "reconsiderblock",
         "Removes invalidity status of a block, its ancestors and its"
         "descendants, reconsider them for activation.\n"
         "This can be used to undo the effects of invalidateblock.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to reconsider"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("reconsiderblock", "\"blockhash\"") +
                     HelpExampleRpc("reconsiderblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             const BlockHash hash(ParseHashV(request.params[0], "blockhash"));
 
             {
                 LOCK(cs_main);
                 CBlockIndex *pblockindex =
                     chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
 
                 chainman.ActiveChainstate().ResetBlockFailureFlags(pblockindex);
             }
 
             BlockValidationState state;
             chainman.ActiveChainstate().ActivateBestChain(config, state);
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.ToString());
             }
 
             return NullUniValue;
         },
     };
 }
 
 RPCHelpMan unparkblock() {
     return RPCHelpMan{
         "unparkblock",
         "Removes parked status of a block and its descendants, reconsider "
         "them for activation.\n"
         "This can be used to undo the effects of parkblock.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "the hash of the block to unpark"},
         },
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("unparkblock", "\"blockhash\"") +
                     HelpExampleRpc("unparkblock", "\"blockhash\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const std::string strHash = request.params[0].get_str();
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             const BlockHash hash(uint256S(strHash));
 
             {
                 LOCK(cs_main);
 
                 CBlockIndex *pblockindex =
                     chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pblockindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
 
                 chainman.ActiveChainstate().UnparkBlockAndChildren(pblockindex);
             }
 
             BlockValidationState state;
             chainman.ActiveChainstate().ActivateBestChain(config, state);
 
             if (!state.IsValid()) {
                 throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());
             }
 
             return NullUniValue;
         },
     };
 }
 
 static RPCHelpMan getchaintxstats() {
     return RPCHelpMan{
         "getchaintxstats",
         "Compute statistics about the total number and rate of transactions "
         "in the chain.\n",
         {
             {"nblocks", RPCArg::Type::NUM, /* default */ "one month",
              "Size of the window in number of blocks"},
             {"blockhash", RPCArg::Type::STR_HEX, /* default */ "chain tip",
              "The hash of the block that ends the window."},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::NUM_TIME, "time",
                        "The timestamp for the final block in the window, "
                        "expressed in " +
                            UNIX_EPOCH_TIME},
                       {RPCResult::Type::NUM, "txcount",
                        "The total number of transactions in the chain up to "
                        "that point"},
                       {RPCResult::Type::STR_HEX, "window_final_block_hash",
                        "The hash of the final block in the window"},
                       {RPCResult::Type::NUM, "window_final_block_height",
                        "The height of the final block in the window."},
                       {RPCResult::Type::NUM, "window_block_count",
                        "Size of the window in number of blocks"},
                       {RPCResult::Type::NUM, "window_tx_count",
                        "The number of transactions in the window. Only "
                        "returned if \"window_block_count\" is > 0"},
                       {RPCResult::Type::NUM, "window_interval",
                        "The elapsed time in the window in seconds. Only "
                        "returned if \"window_block_count\" is > 0"},
                       {RPCResult::Type::NUM, "txrate",
                        "The average rate of transactions per second in the "
                        "window. Only returned if \"window_interval\" is > 0"},
                   }},
         RPCExamples{HelpExampleCli("getchaintxstats", "") +
                     HelpExampleRpc("getchaintxstats", "2016")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             const CBlockIndex *pindex;
 
             // By default: 1 month
             int blockcount =
                 30 * 24 * 60 * 60 /
                 config.GetChainParams().GetConsensus().nPowTargetSpacing;
 
             if (request.params[1].isNull()) {
                 LOCK(cs_main);
                 pindex = chainman.ActiveTip();
             } else {
                 BlockHash hash(ParseHashV(request.params[1], "blockhash"));
                 LOCK(cs_main);
                 pindex = chainman.m_blockman.LookupBlockIndex(hash);
                 if (!pindex) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
                 if (!chainman.ActiveChain().Contains(pindex)) {
                     throw JSONRPCError(RPC_INVALID_PARAMETER,
                                        "Block is not in main chain");
                 }
             }
 
             CHECK_NONFATAL(pindex != nullptr);
 
             if (request.params[0].isNull()) {
                 blockcount =
                     std::max(0, std::min(blockcount, pindex->nHeight - 1));
             } else {
                 blockcount = request.params[0].get_int();
 
                 if (blockcount < 0 ||
                     (blockcount > 0 && blockcount >= pindex->nHeight)) {
                     throw JSONRPCError(RPC_INVALID_PARAMETER,
                                        "Invalid block count: "
                                        "should be between 0 and "
                                        "the block's height - 1");
                 }
             }
 
             const CBlockIndex *pindexPast =
                 pindex->GetAncestor(pindex->nHeight - blockcount);
             int nTimeDiff =
                 pindex->GetMedianTimePast() - pindexPast->GetMedianTimePast();
             int nTxDiff =
                 pindex->GetChainTxCount() - pindexPast->GetChainTxCount();
 
             UniValue ret(UniValue::VOBJ);
             ret.pushKV("time", pindex->GetBlockTime());
             ret.pushKV("txcount", pindex->GetChainTxCount());
             ret.pushKV("window_final_block_hash",
                        pindex->GetBlockHash().GetHex());
             ret.pushKV("window_final_block_height", pindex->nHeight);
             ret.pushKV("window_block_count", blockcount);
             if (blockcount > 0) {
                 ret.pushKV("window_tx_count", nTxDiff);
                 ret.pushKV("window_interval", nTimeDiff);
                 if (nTimeDiff > 0) {
                     ret.pushKV("txrate", double(nTxDiff) / nTimeDiff);
                 }
             }
 
             return ret;
         },
     };
 }
 
 template <typename T>
 static T CalculateTruncatedMedian(std::vector<T> &scores) {
     size_t size = scores.size();
     if (size == 0) {
         return T();
     }
 
     std::sort(scores.begin(), scores.end());
     if (size % 2 == 0) {
         return (scores[size / 2 - 1] + scores[size / 2]) / 2;
     } else {
         return scores[size / 2];
     }
 }
 
 template <typename T> static inline bool SetHasKeys(const std::set<T> &set) {
     return false;
 }
 template <typename T, typename Tk, typename... Args>
 static inline bool SetHasKeys(const std::set<T> &set, const Tk &key,
                               const Args &...args) {
     return (set.count(key) != 0) || SetHasKeys(set, args...);
 }
 
 // outpoint (needed for the utxo index) + nHeight + fCoinBase
 static constexpr size_t PER_UTXO_OVERHEAD =
     sizeof(COutPoint) + sizeof(uint32_t) + sizeof(bool);
 
 static RPCHelpMan getblockstats() {
     const auto &ticker = Currency::get().ticker;
     return RPCHelpMan{
         "getblockstats",
         "Compute per block statistics for a given window. All amounts are "
         "in " +
             ticker +
             ".\n"
             "It won't work for some heights with pruning.\n",
         {
             {"hash_or_height",
              RPCArg::Type::NUM,
              RPCArg::Optional::NO,
              "The block hash or height of the target block",
              "",
              {"", "string or numeric"}},
             {"stats",
              RPCArg::Type::ARR,
              /* default */ "all values",
              "Values to plot (see result below)",
              {
                  {"height", RPCArg::Type::STR, RPCArg::Optional::OMITTED,
                   "Selected statistic"},
                  {"time", RPCArg::Type::STR, RPCArg::Optional::OMITTED,
                   "Selected statistic"},
              },
              "stats"},
         },
         RPCResult{
             RPCResult::Type::OBJ,
             "",
             "",
             {
                 {RPCResult::Type::NUM, "avgfee", "Average fee in the block"},
                 {RPCResult::Type::NUM, "avgfeerate",
                  "Average feerate (in satoshis per virtual byte)"},
                 {RPCResult::Type::NUM, "avgtxsize", "Average transaction size"},
                 {RPCResult::Type::STR_HEX, "blockhash",
                  "The block hash (to check for potential reorgs)"},
                 {RPCResult::Type::NUM, "height", "The height of the block"},
                 {RPCResult::Type::NUM, "ins",
                  "The number of inputs (excluding coinbase)"},
                 {RPCResult::Type::NUM, "maxfee", "Maximum fee in the block"},
                 {RPCResult::Type::NUM, "maxfeerate",
                  "Maximum feerate (in satoshis per virtual byte)"},
                 {RPCResult::Type::NUM, "maxtxsize", "Maximum transaction size"},
                 {RPCResult::Type::NUM, "medianfee",
                  "Truncated median fee in the block"},
                 {RPCResult::Type::NUM, "medianfeerate",
                  "Truncated median feerate (in " + ticker + " per byte)"},
                 {RPCResult::Type::NUM, "mediantime",
                  "The block median time past"},
                 {RPCResult::Type::NUM, "mediantxsize",
                  "Truncated median transaction size"},
                 {RPCResult::Type::NUM, "minfee", "Minimum fee in the block"},
                 {RPCResult::Type::NUM, "minfeerate",
                  "Minimum feerate (in satoshis per virtual byte)"},
                 {RPCResult::Type::NUM, "mintxsize", "Minimum transaction size"},
                 {RPCResult::Type::NUM, "outs", "The number of outputs"},
                 {RPCResult::Type::NUM, "subsidy", "The block subsidy"},
                 {RPCResult::Type::NUM, "time", "The block time"},
                 {RPCResult::Type::NUM, "total_out",
                  "Total amount in all outputs (excluding coinbase and thus "
                  "reward [ie subsidy + totalfee])"},
                 {RPCResult::Type::NUM, "total_size",
                  "Total size of all non-coinbase transactions"},
                 {RPCResult::Type::NUM, "totalfee", "The fee total"},
                 {RPCResult::Type::NUM, "txs",
                  "The number of transactions (including coinbase)"},
                 {RPCResult::Type::NUM, "utxo_increase",
                  "The increase/decrease in the number of unspent outputs"},
                 {RPCResult::Type::NUM, "utxo_size_inc",
                  "The increase/decrease in size for the utxo index (not "
                  "discounting op_return and similar)"},
             }},
         RPCExamples{
             HelpExampleCli(
                 "getblockstats",
                 R"('"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"' '["minfeerate","avgfeerate"]')") +
             HelpExampleCli("getblockstats",
                            R"(1000 '["minfeerate","avgfeerate"]')") +
             HelpExampleRpc(
                 "getblockstats",
                 R"("00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09", ["minfeerate","avgfeerate"])") +
             HelpExampleRpc("getblockstats",
                            R"(1000, ["minfeerate","avgfeerate"])")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             ChainstateManager &chainman = EnsureAnyChainman(request.context);
             LOCK(cs_main);
             CBlockIndex *pindex{ParseHashOrHeight(request.params[0], chainman)};
             CHECK_NONFATAL(pindex != nullptr);
 
             std::set<std::string> stats;
             if (!request.params[1].isNull()) {
                 const UniValue stats_univalue = request.params[1].get_array();
                 for (unsigned int i = 0; i < stats_univalue.size(); i++) {
                     const std::string stat = stats_univalue[i].get_str();
                     stats.insert(stat);
                 }
             }
 
             const CBlock block = GetBlockChecked(config, pindex);
             const CBlockUndo blockUndo = GetUndoChecked(pindex);
 
             // Calculate everything if nothing selected (default)
             const bool do_all = stats.size() == 0;
             const bool do_mediantxsize =
                 do_all || stats.count("mediantxsize") != 0;
             const bool do_medianfee = do_all || stats.count("medianfee") != 0;
             const bool do_medianfeerate =
                 do_all || stats.count("medianfeerate") != 0;
             const bool loop_inputs =
                 do_all || do_medianfee || do_medianfeerate ||
                 SetHasKeys(stats, "utxo_size_inc", "totalfee", "avgfee",
                            "avgfeerate", "minfee", "maxfee", "minfeerate",
                            "maxfeerate");
             const bool loop_outputs =
                 do_all || loop_inputs || stats.count("total_out");
             const bool do_calculate_size =
                 do_mediantxsize || loop_inputs ||
                 SetHasKeys(stats, "total_size", "avgtxsize", "mintxsize",
                            "maxtxsize");
 
             const int64_t blockMaxSize = config.GetMaxBlockSize();
             Amount maxfee = Amount::zero();
             Amount maxfeerate = Amount::zero();
             Amount minfee = MAX_MONEY;
             Amount minfeerate = MAX_MONEY;
             Amount total_out = Amount::zero();
             Amount totalfee = Amount::zero();
             int64_t inputs = 0;
             int64_t maxtxsize = 0;
             int64_t mintxsize = blockMaxSize;
             int64_t outputs = 0;
             int64_t total_size = 0;
             int64_t utxo_size_inc = 0;
             std::vector<Amount> fee_array;
             std::vector<Amount> feerate_array;
             std::vector<int64_t> txsize_array;
 
             for (size_t i = 0; i < block.vtx.size(); ++i) {
                 const auto &tx = block.vtx.at(i);
                 outputs += tx->vout.size();
                 Amount tx_total_out = Amount::zero();
                 if (loop_outputs) {
                     for (const CTxOut &out : tx->vout) {
                         tx_total_out += out.nValue;
                         utxo_size_inc +=
                             GetSerializeSize(out, PROTOCOL_VERSION) +
                             PER_UTXO_OVERHEAD;
                     }
                 }
 
                 if (tx->IsCoinBase()) {
                     continue;
                 }
 
                 // Don't count coinbase's fake input
                 inputs += tx->vin.size();
                 // Don't count coinbase reward
                 total_out += tx_total_out;
 
                 int64_t tx_size = 0;
                 if (do_calculate_size) {
                     tx_size = tx->GetTotalSize();
                     if (do_mediantxsize) {
                         txsize_array.push_back(tx_size);
                     }
                     maxtxsize = std::max(maxtxsize, tx_size);
                     mintxsize = std::min(mintxsize, tx_size);
                     total_size += tx_size;
                 }
 
                 if (loop_inputs) {
                     Amount tx_total_in = Amount::zero();
                     const auto &txundo = blockUndo.vtxundo.at(i - 1);
                     for (const Coin &coin : txundo.vprevout) {
                         const CTxOut &prevoutput = coin.GetTxOut();
 
                         tx_total_in += prevoutput.nValue;
                         utxo_size_inc -=
                             GetSerializeSize(prevoutput, PROTOCOL_VERSION) +
                             PER_UTXO_OVERHEAD;
                     }
 
                     Amount txfee = tx_total_in - tx_total_out;
                     CHECK_NONFATAL(MoneyRange(txfee));
                     if (do_medianfee) {
                         fee_array.push_back(txfee);
                     }
                     maxfee = std::max(maxfee, txfee);
                     minfee = std::min(minfee, txfee);
                     totalfee += txfee;
 
                     Amount feerate = txfee / tx_size;
                     if (do_medianfeerate) {
                         feerate_array.push_back(feerate);
                     }
                     maxfeerate = std::max(maxfeerate, feerate);
                     minfeerate = std::min(minfeerate, feerate);
                 }
             }
 
             UniValue ret_all(UniValue::VOBJ);
             ret_all.pushKV("avgfee",
                            block.vtx.size() > 1
                                ? (totalfee / int((block.vtx.size() - 1)))
                                : Amount::zero());
             ret_all.pushKV("avgfeerate", total_size > 0
                                              ? (totalfee / total_size)
                                              : Amount::zero());
             ret_all.pushKV("avgtxsize",
                            (block.vtx.size() > 1)
                                ? total_size / (block.vtx.size() - 1)
                                : 0);
             ret_all.pushKV("blockhash", pindex->GetBlockHash().GetHex());
             ret_all.pushKV("height", (int64_t)pindex->nHeight);
             ret_all.pushKV("ins", inputs);
             ret_all.pushKV("maxfee", maxfee);
             ret_all.pushKV("maxfeerate", maxfeerate);
             ret_all.pushKV("maxtxsize", maxtxsize);
             ret_all.pushKV("medianfee", CalculateTruncatedMedian(fee_array));
             ret_all.pushKV("medianfeerate",
                            CalculateTruncatedMedian(feerate_array));
             ret_all.pushKV("mediantime", pindex->GetMedianTimePast());
             ret_all.pushKV("mediantxsize",
                            CalculateTruncatedMedian(txsize_array));
             ret_all.pushKV("minfee",
                            minfee == MAX_MONEY ? Amount::zero() : minfee);
             ret_all.pushKV("minfeerate", minfeerate == MAX_MONEY
                                              ? Amount::zero()
                                              : minfeerate);
             ret_all.pushKV("mintxsize",
                            mintxsize == blockMaxSize ? 0 : mintxsize);
             ret_all.pushKV("outs", outputs);
             ret_all.pushKV("subsidy", GetBlockSubsidy(pindex->nHeight,
                                                       Params().GetConsensus()));
             ret_all.pushKV("time", pindex->GetBlockTime());
             ret_all.pushKV("total_out", total_out);
             ret_all.pushKV("total_size", total_size);
             ret_all.pushKV("totalfee", totalfee);
             ret_all.pushKV("txs", (int64_t)block.vtx.size());
             ret_all.pushKV("utxo_increase", outputs - inputs);
             ret_all.pushKV("utxo_size_inc", utxo_size_inc);
 
             if (do_all) {
                 return ret_all;
             }
 
             UniValue ret(UniValue::VOBJ);
             for (const std::string &stat : stats) {
                 const UniValue &value = ret_all[stat];
                 if (value.isNull()) {
                     throw JSONRPCError(
                         RPC_INVALID_PARAMETER,
                         strprintf("Invalid selected statistic %s", stat));
                 }
                 ret.pushKV(stat, value);
             }
             return ret;
         },
     };
 }
 
 static RPCHelpMan savemempool() {
     return RPCHelpMan{
         "savemempool",
         "Dumps the mempool to disk. It will fail until the previous dump is "
         "fully loaded.\n",
         {},
         RPCResult{RPCResult::Type::NONE, "", ""},
         RPCExamples{HelpExampleCli("savemempool", "") +
                     HelpExampleRpc("savemempool", "")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const CTxMemPool &mempool = EnsureAnyMemPool(request.context);
 
             if (!mempool.IsLoaded()) {
                 throw JSONRPCError(RPC_MISC_ERROR,
                                    "The mempool was not loaded yet");
             }
 
             if (!DumpMempool(mempool)) {
                 throw JSONRPCError(RPC_MISC_ERROR,
                                    "Unable to dump mempool to disk");
             }
 
             return NullUniValue;
         },
     };
 }
 
 namespace {
 //! Search for a given set of pubkey scripts
 static bool FindScriptPubKey(std::atomic<int> &scan_progress,
                              const std::atomic<bool> &should_abort,
                              int64_t &count, CCoinsViewCursor *cursor,
                              const std::set<CScript> &needles,
                              std::map<COutPoint, Coin> &out_results,
                              std::function<void()> &interruption_point) {
     scan_progress = 0;
     count = 0;
     while (cursor->Valid()) {
         COutPoint key;
         Coin coin;
         if (!cursor->GetKey(key) || !cursor->GetValue(coin)) {
             return false;
         }
         if (++count % 8192 == 0) {
             interruption_point();
             if (should_abort) {
                 // allow to abort the scan via the abort reference
                 return false;
             }
         }
         if (count % 256 == 0) {
             // update progress reference every 256 item
             const TxId &txid = key.GetTxId();
             uint32_t high = 0x100 * *txid.begin() + *(txid.begin() + 1);
             scan_progress = int(high * 100.0 / 65536.0 + 0.5);
         }
         if (needles.count(coin.GetTxOut().scriptPubKey)) {
             out_results.emplace(key, coin);
         }
         cursor->Next();
     }
     scan_progress = 100;
     return true;
 }
 } // namespace
 
 /** RAII object to prevent concurrency issue when scanning the txout set */
 static std::atomic<int> g_scan_progress;
 static std::atomic<bool> g_scan_in_progress;
 static std::atomic<bool> g_should_abort_scan;
 class CoinsViewScanReserver {
 private:
     bool m_could_reserve;
 
 public:
     explicit CoinsViewScanReserver() : m_could_reserve(false) {}
 
     bool reserve() {
         CHECK_NONFATAL(!m_could_reserve);
         if (g_scan_in_progress.exchange(true)) {
             return false;
         }
         m_could_reserve = true;
         return true;
     }
 
     ~CoinsViewScanReserver() {
         if (m_could_reserve) {
             g_scan_in_progress = false;
         }
     }
 };
 
 static RPCHelpMan scantxoutset() {
     const auto &ticker = Currency::get().ticker;
     return RPCHelpMan{
         "scantxoutset",
         "Scans the unspent transaction output set for entries that match "
         "certain output descriptors.\n"
         "Examples of output descriptors are:\n"
         "    addr(<address>)                      Outputs whose scriptPubKey "
         "corresponds to the specified address (does not include P2PK)\n"
         "    raw(<hex script>)                    Outputs whose scriptPubKey "
         "equals the specified hex scripts\n"
         "    combo(<pubkey>)                      P2PK and P2PKH outputs for "
         "the given pubkey\n"
         "    pkh(<pubkey>)                        P2PKH outputs for the given "
         "pubkey\n"
         "    sh(multi(<n>,<pubkey>,<pubkey>,...)) P2SH-multisig outputs for "
         "the given threshold and pubkeys\n"
         "\nIn the above, <pubkey> either refers to a fixed public key in "
         "hexadecimal notation, or to an xpub/xprv optionally followed by one\n"
         "or more path elements separated by \"/\", and optionally ending in "
         "\"/*\" (unhardened), or \"/*'\" or \"/*h\" (hardened) to specify all\n"
         "unhardened or hardened child keys.\n"
         "In the latter case, a range needs to be specified by below if "
         "different from 1000.\n"
         "For more information on output descriptors, see the documentation in "
         "the doc/descriptors.md file.\n",
         {
             {"action", RPCArg::Type::STR, RPCArg::Optional::NO,
              "The action to execute\n"
              "                                      \"start\" for starting a "
              "scan\n"
              "                                      \"abort\" for aborting the "
              "current scan (returns true when abort was successful)\n"
              "                                      \"status\" for "
              "progress report (in %) of the current scan"},
             {"scanobjects",
              RPCArg::Type::ARR,
              RPCArg::Optional::OMITTED,
              "Array of scan objects. Required for \"start\" action\n"
              "                                  Every scan object is either a "
              "string descriptor or an object:",
              {
                  {"descriptor", RPCArg::Type::STR, RPCArg::Optional::OMITTED,
                   "An output descriptor"},
                  {
                      "",
                      RPCArg::Type::OBJ,
                      RPCArg::Optional::OMITTED,
                      "An object with output descriptor and metadata",
                      {
                          {"desc", RPCArg::Type::STR, RPCArg::Optional::NO,
                           "An output descriptor"},
                          {"range", RPCArg::Type::RANGE, /* default */ "1000",
                           "The range of HD chain indexes to explore (either "
                           "end or [begin,end])"},
                      },
                  },
              },
              "[scanobjects,...]"},
         },
         {
             RPCResult{"When action=='abort'", RPCResult::Type::BOOL, "", ""},
             RPCResult{"When action=='status' and no scan is in progress",
                       RPCResult::Type::NONE, "", ""},
             RPCResult{
                 "When action=='status' and scan is in progress",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::NUM, "progress", "The scan progress"},
                 }},
             RPCResult{
                 "When action=='start'",
                 RPCResult::Type::OBJ,
                 "",
                 "",
                 {
                     {RPCResult::Type::BOOL, "success",
                      "Whether the scan was completed"},
                     {RPCResult::Type::NUM, "txouts",
                      "The number of unspent transaction outputs scanned"},
                     {RPCResult::Type::NUM, "height",
                      "The current block height (index)"},
                     {RPCResult::Type::STR_HEX, "bestblock",
                      "The hash of the block at the tip of the chain"},
                     {RPCResult::Type::ARR,
                      "unspents",
                      "",
                      {
                          {RPCResult::Type::OBJ,
                           "",
                           "",
                           {
                               {RPCResult::Type::STR_HEX, "txid",
                                "The transaction id"},
                               {RPCResult::Type::NUM, "vout", "The vout value"},
                               {RPCResult::Type::STR_HEX, "scriptPubKey",
                                "The script key"},
                               {RPCResult::Type::STR, "desc",
                                "A specialized descriptor for the matched "
                                "scriptPubKey"},
                               {RPCResult::Type::STR_AMOUNT, "amount",
                                "The total amount in " + ticker +
                                    " of the unspent output"},
                               {RPCResult::Type::NUM, "height",
                                "Height of the unspent transaction output"},
                           }},
                      }},
                     {RPCResult::Type::STR_AMOUNT, "total_amount",
                      "The total amount of all found unspent outputs in " +
                          ticker},
                 }},
         },
         RPCExamples{""},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VARR});
 
             UniValue result(UniValue::VOBJ);
             if (request.params[0].get_str() == "status") {
                 CoinsViewScanReserver reserver;
                 if (reserver.reserve()) {
                     // no scan in progress
                     return NullUniValue;
                 }
                 result.pushKV("progress", g_scan_progress.load());
                 return result;
             } else if (request.params[0].get_str() == "abort") {
                 CoinsViewScanReserver reserver;
                 if (reserver.reserve()) {
                     // reserve was possible which means no scan was running
                     return false;
                 }
                 // set the abort flag
                 g_should_abort_scan = true;
                 return true;
             } else if (request.params[0].get_str() == "start") {
                 CoinsViewScanReserver reserver;
                 if (!reserver.reserve()) {
                     throw JSONRPCError(RPC_INVALID_PARAMETER,
                                        "Scan already in progress, use action "
                                        "\"abort\" or \"status\"");
                 }
 
                 if (request.params.size() < 2) {
                     throw JSONRPCError(RPC_MISC_ERROR,
                                        "scanobjects argument is required for "
                                        "the start action");
                 }
 
                 std::set<CScript> needles;
                 std::map<CScript, std::string> descriptors;
                 Amount total_in = Amount::zero();
 
                 // loop through the scan objects
                 for (const UniValue &scanobject :
                      request.params[1].get_array().getValues()) {
                     FlatSigningProvider provider;
                     auto scripts =
                         EvalDescriptorStringOrObject(scanobject, provider);
                     for (const auto &script : scripts) {
                         std::string inferred =
                             InferDescriptor(script, provider)->ToString();
                         needles.emplace(script);
                         descriptors.emplace(std::move(script),
                                             std::move(inferred));
                     }
                 }
 
                 // Scan the unspent transaction output set for inputs
                 UniValue unspents(UniValue::VARR);
                 std::vector<CTxOut> input_txos;
                 std::map<COutPoint, Coin> coins;
                 g_should_abort_scan = false;
                 g_scan_progress = 0;
                 int64_t count = 0;
                 std::unique_ptr<CCoinsViewCursor> pcursor;
                 CBlockIndex *tip;
                 NodeContext &node = EnsureAnyNodeContext(request.context);
                 {
                     ChainstateManager &chainman = EnsureChainman(node);
                     LOCK(cs_main);
                     CChainState &active_chainstate =
                         chainman.ActiveChainstate();
                     active_chainstate.ForceFlushStateToDisk();
                     pcursor = std::unique_ptr<CCoinsViewCursor>(
                         active_chainstate.CoinsDB().Cursor());
                     CHECK_NONFATAL(pcursor);
                     tip = active_chainstate.m_chain.Tip();
                     CHECK_NONFATAL(tip);
                 }
                 bool res = FindScriptPubKey(
                     g_scan_progress, g_should_abort_scan, count, pcursor.get(),
                     needles, coins, node.rpc_interruption_point);
                 result.pushKV("success", res);
                 result.pushKV("txouts", count);
                 result.pushKV("height", tip->nHeight);
                 result.pushKV("bestblock", tip->GetBlockHash().GetHex());
 
                 for (const auto &it : coins) {
                     const COutPoint &outpoint = it.first;
                     const Coin &coin = it.second;
                     const CTxOut &txo = coin.GetTxOut();
                     input_txos.push_back(txo);
                     total_in += txo.nValue;
 
                     UniValue unspent(UniValue::VOBJ);
                     unspent.pushKV("txid", outpoint.GetTxId().GetHex());
                     unspent.pushKV("vout", int32_t(outpoint.GetN()));
                     unspent.pushKV("scriptPubKey", HexStr(txo.scriptPubKey));
                     unspent.pushKV("desc", descriptors[txo.scriptPubKey]);
                     unspent.pushKV("amount", txo.nValue);
                     unspent.pushKV("height", int32_t(coin.GetHeight()));
 
                     unspents.push_back(unspent);
                 }
                 result.pushKV("unspents", unspents);
                 result.pushKV("total_amount", total_in);
             } else {
                 throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid command");
             }
             return result;
         },
     };
 }
 
 static RPCHelpMan getblockfilter() {
     return RPCHelpMan{
         "getblockfilter",
         "Retrieve a BIP 157 content filter for a particular block.\n",
         {
             {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO,
              "The hash of the block"},
             {"filtertype", RPCArg::Type::STR, /*default*/ "basic",
              "The type name of the filter"},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::STR_HEX, "filter",
                        "the hex-encoded filter data"},
                       {RPCResult::Type::STR_HEX, "header",
                        "the hex-encoded filter header"},
                   }},
         RPCExamples{
             HelpExampleCli("getblockfilter",
                            "\"00000000c937983704a73af28acdec37b049d214a"
                            "dbda81d7e2a3dd146f6ed09\" \"basic\"") +
             HelpExampleRpc("getblockfilter",
                            "\"00000000c937983704a73af28acdec37b049d214adbda81d7"
                            "e2a3dd146f6ed09\", \"basic\"")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             const BlockHash block_hash(
                 ParseHashV(request.params[0], "blockhash"));
             std::string filtertype_name = "basic";
             if (!request.params[1].isNull()) {
                 filtertype_name = request.params[1].get_str();
             }
 
             BlockFilterType filtertype;
             if (!BlockFilterTypeByName(filtertype_name, filtertype)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    "Unknown filtertype");
             }
 
             BlockFilterIndex *index = GetBlockFilterIndex(filtertype);
             if (!index) {
                 throw JSONRPCError(RPC_MISC_ERROR,
                                    "Index is not enabled for filtertype " +
                                        filtertype_name);
             }
 
             const CBlockIndex *block_index;
             bool block_was_connected;
             {
                 ChainstateManager &chainman =
                     EnsureAnyChainman(request.context);
                 LOCK(cs_main);
                 block_index = chainman.m_blockman.LookupBlockIndex(block_hash);
                 if (!block_index) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                        "Block not found");
                 }
                 block_was_connected =
                     block_index->IsValid(BlockValidity::SCRIPTS);
             }
 
             bool index_ready = index->BlockUntilSyncedToCurrentChain();
 
             BlockFilter filter;
             uint256 filter_header;
             if (!index->LookupFilter(block_index, filter) ||
                 !index->LookupFilterHeader(block_index, filter_header)) {
                 int err_code;
                 std::string errmsg = "Filter not found.";
 
                 if (!block_was_connected) {
                     err_code = RPC_INVALID_ADDRESS_OR_KEY;
                     errmsg += " Block was not connected to active chain.";
                 } else if (!index_ready) {
                     err_code = RPC_MISC_ERROR;
                     errmsg += " Block filters are still in the process of "
                               "being indexed.";
                 } else {
                     err_code = RPC_INTERNAL_ERROR;
                     errmsg += " This error is unexpected and indicates index "
                               "corruption.";
                 }
 
                 throw JSONRPCError(err_code, errmsg);
             }
 
             UniValue ret(UniValue::VOBJ);
             ret.pushKV("filter", HexStr(filter.GetEncodedFilter()));
             ret.pushKV("header", filter_header.GetHex());
             return ret;
         },
     };
 }
 
 /**
  * Serialize the UTXO set to a file for loading elsewhere.
  *
  * @see SnapshotMetadata
  */
 static RPCHelpMan dumptxoutset() {
     return RPCHelpMan{
         "dumptxoutset",
         "Write the serialized UTXO set to disk.\n",
         {
             {"path", RPCArg::Type::STR, RPCArg::Optional::NO,
              "path to the output file. If relative, will be prefixed by "
              "datadir."},
         },
         RPCResult{RPCResult::Type::OBJ,
                   "",
                   "",
                   {
                       {RPCResult::Type::NUM, "coins_written",
                        "the number of coins written in the snapshot"},
                       {RPCResult::Type::STR_HEX, "base_hash",
                        "the hash of the base of the snapshot"},
                       {RPCResult::Type::NUM, "base_height",
                        "the height of the base of the snapshot"},
                       {RPCResult::Type::STR, "path",
                        "the absolute path that the snapshot was written to"},
                   }},
         RPCExamples{HelpExampleCli("dumptxoutset", "utxo.dat")},
         [&](const RPCHelpMan &self, const Config &config,
             const JSONRPCRequest &request) -> UniValue {
             fs::path path = fs::absolute(
                 fs::u8path(request.params[0].get_str()), GetDataDir());
             // Write to a temporary path and then move into `path` on completion
             // to avoid confusion due to an interruption.
             fs::path temppath = fs::absolute(
                 fs::u8path(request.params[0].get_str() + ".incomplete"),
                 GetDataDir());
 
             if (fs::exists(path)) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,
                                    path.u8string() +
                                        " already exists. If you are sure this "
                                        "is what you want, "
                                        "move it out of the way first");
             }
 
             FILE *file{fsbridge::fopen(temppath, "wb")};
             CAutoFile afile{file, SER_DISK, CLIENT_VERSION};
             NodeContext &node = EnsureAnyNodeContext(request.context);
             UniValue result = CreateUTXOSnapshot(
                 node, node.chainman->ActiveChainstate(), afile);
             fs::rename(temppath, path);
 
             result.pushKV("path", path.u8string());
             return result;
         },
     };
 }
 
 UniValue CreateUTXOSnapshot(NodeContext &node, CChainState &chainstate,
                             CAutoFile &afile) {
     std::unique_ptr<CCoinsViewCursor> pcursor;
     CCoinsStats stats{CoinStatsHashType::NONE};
     CBlockIndex *tip;
 
     {
         // We need to lock cs_main to ensure that the coinsdb isn't
         // written to between (i) flushing coins cache to disk
         // (coinsdb), (ii) getting stats based upon the coinsdb, and
         // (iii) constructing a cursor to the coinsdb for use below this
         // block.
         //
         // Cursors returned by leveldb iterate over snapshots, so the
         // contents of the pcursor will not be affected by simultaneous
         // writes during use below this block.
         //
         // See discussion here:
         //   https://github.com/bitcoin/bitcoin/pull/15606#discussion_r274479369
         //
         LOCK(::cs_main);
 
         chainstate.ForceFlushStateToDisk();
 
         if (!GetUTXOStats(&chainstate.CoinsDB(), chainstate.m_blockman, stats,
                           node.rpc_interruption_point)) {
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Unable to read UTXO set");
         }
 
         pcursor =
             std::unique_ptr<CCoinsViewCursor>(chainstate.CoinsDB().Cursor());
         tip = chainstate.m_blockman.LookupBlockIndex(stats.hashBlock);
         CHECK_NONFATAL(tip);
     }
 
     SnapshotMetadata metadata{tip->GetBlockHash(), stats.coins_count,
                               uint64_t(tip->GetChainTxCount())};
 
     afile << metadata;
 
     COutPoint key;
     Coin coin;
     unsigned int iter{0};
 
     while (pcursor->Valid()) {
         if (iter % 5000 == 0) {
             node.rpc_interruption_point();
         }
         ++iter;
         if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
             afile << key;
             afile << coin;
         }
 
         pcursor->Next();
     }
 
     afile.fclose();
 
     UniValue result(UniValue::VOBJ);
     result.pushKV("coins_written", stats.coins_count);
     result.pushKV("base_hash", tip->GetBlockHash().ToString());
     result.pushKV("base_height", tip->nHeight);
     return result;
 }
 
 void RegisterBlockchainRPCCommands(CRPCTable &t) {
     // clang-format off
     static const CRPCCommand commands[] = {
         //  category            actor (function)
         //  ------------------  ----------------------
         { "blockchain",         getbestblockhash,                  },
         { "blockchain",         getblock,                          },
         { "blockchain",         getblockchaininfo,                 },
         { "blockchain",         getblockcount,                     },
         { "blockchain",         getblockhash,                      },
         { "blockchain",         getblockheader,                    },
         { "blockchain",         getblockstats,                     },
         { "blockchain",         getchaintips,                      },
         { "blockchain",         getchaintxstats,                   },
         { "blockchain",         getdifficulty,                     },
         { "blockchain",         getmempoolancestors,               },
         { "blockchain",         getmempooldescendants,             },
         { "blockchain",         getmempoolentry,                   },
         { "blockchain",         getmempoolinfo,                    },
         { "blockchain",         getrawmempool,                     },
         { "blockchain",         gettxout,                          },
         { "blockchain",         gettxoutsetinfo,                   },
         { "blockchain",         pruneblockchain,                   },
         { "blockchain",         savemempool,                       },
         { "blockchain",         verifychain,                       },
         { "blockchain",         preciousblock,                     },
         { "blockchain",         scantxoutset,                      },
         { "blockchain",         getblockfilter,                    },
 
         /* Not shown in help */
         { "hidden",             getfinalizedblockhash,             },
         { "hidden",             finalizeblock,                     },
         { "hidden",             invalidateblock,                   },
         { "hidden",             parkblock,                         },
         { "hidden",             reconsiderblock,                   },
         { "hidden",             syncwithvalidationinterfacequeue,  },
         { "hidden",             dumptxoutset,                      },
         { "hidden",             unparkblock,                       },
         { "hidden",             waitfornewblock,                   },
         { "hidden",             waitforblock,                      },
         { "hidden",             waitforblockheight,                },
     };
     // clang-format on
     for (const auto &c : commands) {
         t.appendCommand(c.name, &c);
     }
 }
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index 930abddc5..73d051a64 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -1,258 +1,259 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <rpc/client.h>
 #include <util/system.h>
 
 #include <cstdint>
 #include <set>
 
 class CRPCConvertParam {
 public:
     std::string methodName; //!< method whose params want conversion
     int paramIdx;           //!< 0-based idx of param to convert
     std::string paramName;  //!< parameter name
 };
 
 /**
  * Specify a (method, idx, name) here if the argument is a non-string RPC
  * argument and needs to be converted from JSON.
  *
  * @note Parameter indexes start from 0.
  */
 static const CRPCConvertParam vRPCConvertParams[] = {
     {"setmocktime", 0, "timestamp"},
     {"mockscheduler", 0, "delta_time"},
     {"utxoupdatepsbt", 1, "descriptors"},
     {"generatetoaddress", 0, "nblocks"},
     {"generatetoaddress", 2, "maxtries"},
     {"generatetodescriptor", 0, "num_blocks"},
     {"generatetodescriptor", 2, "maxtries"},
     {"generateblock", 1, "transactions"},
     {"getnetworkhashps", 0, "nblocks"},
     {"getnetworkhashps", 1, "height"},
     {"sendtoaddress", 1, "amount"},
     {"sendtoaddress", 4, "subtractfeefromamount"},
     {"sendtoaddress", 5, "avoid_reuse"},
     {"settxfee", 0, "amount"},
     {"sethdseed", 0, "newkeypool"},
     {"getreceivedbyaddress", 1, "minconf"},
     {"getreceivedbylabel", 1, "minconf"},
     {"listreceivedbyaddress", 0, "minconf"},
     {"listreceivedbyaddress", 1, "include_empty"},
     {"listreceivedbyaddress", 2, "include_watchonly"},
     {"listreceivedbylabel", 0, "minconf"},
     {"listreceivedbylabel", 1, "include_empty"},
     {"listreceivedbylabel", 2, "include_watchonly"},
     {"getbalance", 1, "minconf"},
     {"getbalance", 2, "include_watchonly"},
     {"getbalance", 3, "avoid_reuse"},
     {"getblockhash", 0, "height"},
     {"waitforblockheight", 0, "height"},
     {"waitforblockheight", 1, "timeout"},
     {"waitforblock", 1, "timeout"},
     {"waitfornewblock", 0, "timeout"},
     {"listtransactions", 1, "count"},
     {"listtransactions", 2, "skip"},
     {"listtransactions", 3, "include_watchonly"},
     {"walletpassphrase", 1, "timeout"},
     {"getblocktemplate", 0, "template_request"},
     {"listsinceblock", 1, "target_confirmations"},
     {"listsinceblock", 2, "include_watchonly"},
     {"listsinceblock", 3, "include_removed"},
     {"sendmany", 1, "amounts"},
     {"sendmany", 2, "minconf"},
     {"sendmany", 4, "subtractfeefrom"},
     {"deriveaddresses", 1, "range"},
     {"scantxoutset", 1, "scanobjects"},
     {"addmultisigaddress", 0, "nrequired"},
     {"addmultisigaddress", 1, "keys"},
     {"createmultisig", 0, "nrequired"},
     {"createmultisig", 1, "keys"},
     {"listunspent", 0, "minconf"},
     {"listunspent", 1, "maxconf"},
     {"listunspent", 2, "addresses"},
     {"listunspent", 3, "include_unsafe"},
     {"listunspent", 4, "query_options"},
     {"getblock", 1, "verbosity"},
     {"getblock", 1, "verbose"},
     {"getblockheader", 1, "verbose"},
     {"getchaintxstats", 0, "nblocks"},
     {"gettransaction", 1, "include_watchonly"},
     {"gettransaction", 2, "verbose"},
     {"getrawtransaction", 1, "verbose"},
     {"createrawtransaction", 0, "inputs"},
     {"createrawtransaction", 1, "outputs"},
     {"createrawtransaction", 2, "locktime"},
     {"signrawtransactionwithkey", 1, "privkeys"},
     {"signrawtransactionwithkey", 2, "prevtxs"},
     {"signrawtransactionwithwallet", 1, "prevtxs"},
     {"sendrawtransaction", 1, "maxfeerate"},
     {"testmempoolaccept", 0, "rawtxs"},
     {"testmempoolaccept", 1, "maxfeerate"},
     {"combinerawtransaction", 0, "txs"},
     {"fundrawtransaction", 1, "options"},
     {"walletcreatefundedpsbt", 0, "inputs"},
     {"walletcreatefundedpsbt", 1, "outputs"},
     {"walletcreatefundedpsbt", 2, "locktime"},
     {"walletcreatefundedpsbt", 3, "options"},
     {"walletcreatefundedpsbt", 4, "bip32derivs"},
     {"walletprocesspsbt", 1, "sign"},
     {"walletprocesspsbt", 3, "bip32derivs"},
     {"createpsbt", 0, "inputs"},
     {"createpsbt", 1, "outputs"},
     {"createpsbt", 2, "locktime"},
     {"combinepsbt", 0, "txs"},
     {"joinpsbts", 0, "txs"},
     {"finalizepsbt", 1, "extract"},
     {"converttopsbt", 1, "permitsigdata"},
     {"gettxout", 1, "n"},
     {"gettxout", 2, "include_mempool"},
     {"gettxoutproof", 0, "txids"},
     {"gettxoutsetinfo", 1, "hash_or_height"},
+    {"gettxoutsetinfo", 2, "use_index"},
     {"lockunspent", 0, "unlock"},
     {"lockunspent", 1, "transactions"},
     {"send", 0, "outputs"},
     {"send", 1, "options"},
     {"importprivkey", 2, "rescan"},
     {"importaddress", 2, "rescan"},
     {"importaddress", 3, "p2sh"},
     {"importpubkey", 2, "rescan"},
     {"importmulti", 0, "requests"},
     {"importmulti", 1, "options"},
     {"importdescriptors", 0, "requests"},
     {"verifychain", 0, "checklevel"},
     {"verifychain", 1, "nblocks"},
     {"getblockstats", 0, "hash_or_height"},
     {"getblockstats", 1, "stats"},
     {"pruneblockchain", 0, "height"},
     {"keypoolrefill", 0, "newsize"},
     {"getrawmempool", 0, "verbose"},
     {"getrawmempool", 1, "mempool_sequence"},
     {"prioritisetransaction", 1, "dummy"},
     {"prioritisetransaction", 2, "fee_delta"},
     {"setban", 2, "bantime"},
     {"setban", 3, "absolute"},
     {"setnetworkactive", 0, "state"},
     {"setwalletflag", 1, "value"},
     {"getmempoolancestors", 1, "verbose"},
     {"getmempooldescendants", 1, "verbose"},
     {"disconnectnode", 1, "nodeid"},
     {"logging", 0, "include"},
     {"logging", 1, "exclude"},
     {"upgradewallet", 0, "version"},
     // Echo with conversion (For testing only)
     {"echojson", 0, "arg0"},
     {"echojson", 1, "arg1"},
     {"echojson", 2, "arg2"},
     {"echojson", 3, "arg3"},
     {"echojson", 4, "arg4"},
     {"echojson", 5, "arg5"},
     {"echojson", 6, "arg6"},
     {"echojson", 7, "arg7"},
     {"echojson", 8, "arg8"},
     {"echojson", 9, "arg9"},
     {"rescanblockchain", 0, "start_height"},
     {"rescanblockchain", 1, "stop_height"},
     {"createwallet", 1, "disable_private_keys"},
     {"createwallet", 2, "blank"},
     {"createwallet", 4, "avoid_reuse"},
     {"createwallet", 5, "descriptors"},
     {"createwallet", 6, "load_on_startup"},
     {"loadwallet", 1, "load_on_startup"},
     {"unloadwallet", 1, "load_on_startup"},
     {"getnodeaddresses", 0, "count"},
     {"addpeeraddress", 1, "port"},
     {"stop", 0, "wait"},
     // Avalanche
     {"addavalanchenode", 0, "nodeid"},
     {"buildavalancheproof", 0, "sequence"},
     {"buildavalancheproof", 1, "expiration"},
     {"buildavalancheproof", 3, "stakes"},
 };
 
 class CRPCConvertTable {
 private:
     std::set<std::pair<std::string, int>> members;
     std::set<std::pair<std::string, std::string>> membersByName;
 
 public:
     CRPCConvertTable();
 
     bool convert(const std::string &method, int idx) {
         return (members.count(std::make_pair(method, idx)) > 0);
     }
     bool convert(const std::string &method, const std::string &name) {
         return (membersByName.count(std::make_pair(method, name)) > 0);
     }
 };
 
 CRPCConvertTable::CRPCConvertTable() {
     for (const auto &cp : vRPCConvertParams) {
         members.emplace(cp.methodName, cp.paramIdx);
         membersByName.emplace(cp.methodName, cp.paramName);
     }
 }
 
 static CRPCConvertTable rpcCvtTable;
 
 /**
  * Non-RFC4627 JSON parser, accepts internal values (such as numbers, true,
  * false, null) as well as objects and arrays.
  */
 UniValue ParseNonRFCJSONValue(const std::string &strVal) {
     UniValue jVal;
     if (!jVal.read(std::string("[") + strVal + std::string("]")) ||
         !jVal.isArray() || jVal.size() != 1) {
         throw std::runtime_error(std::string("Error parsing JSON: ") + strVal);
     }
     return jVal[0];
 }
 
 UniValue RPCConvertValues(const std::string &strMethod,
                           const std::vector<std::string> &strParams) {
     UniValue params(UniValue::VARR);
 
     for (unsigned int idx = 0; idx < strParams.size(); idx++) {
         const std::string &strVal = strParams[idx];
 
         if (!rpcCvtTable.convert(strMethod, idx)) {
             // insert string value directly
             params.push_back(strVal);
         } else {
             // parse string as JSON, insert bool/number/object/etc. value
             params.push_back(ParseNonRFCJSONValue(strVal));
         }
     }
 
     return params;
 }
 
 UniValue RPCConvertNamedValues(const std::string &strMethod,
                                const std::vector<std::string> &strParams) {
     UniValue params(UniValue::VOBJ);
 
     for (const std::string &s : strParams) {
         size_t pos = s.find('=');
         if (pos == std::string::npos) {
             throw(std::runtime_error("No '=' in named argument '" + s +
                                      "', this needs to be present for every "
                                      "argument (even if it is empty)"));
         }
 
         std::string name = s.substr(0, pos);
         std::string value = s.substr(pos + 1);
 
         if (!rpcCvtTable.convert(strMethod, name)) {
             // insert string value directly
             params.pushKV(name, value);
         } else {
             // parse string as JSON, insert bool/number/object/etc. value
             params.pushKV(name, ParseNonRFCJSONValue(value));
         }
     }
 
     return params;
 }
diff --git a/test/functional/feature_coinstatsindex.py b/test/functional/feature_coinstatsindex.py
index ae40ac4b6..01a69bbad 100755
--- a/test/functional/feature_coinstatsindex.py
+++ b/test/functional/feature_coinstatsindex.py
@@ -1,259 +1,271 @@
 #!/usr/bin/env python3
 # Copyright (c) 2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test coinstatsindex across nodes.
 
 Test that the values returned by gettxoutsetinfo are consistent
 between a node running the coinstatsindex and a node without
 the index.
 """
 
 from decimal import Decimal
 
 from test_framework.blocktools import create_block, create_coinbase
 from test_framework.messages import (
     XEC,
     COutPoint,
     CTransaction,
     CTxIn,
     CTxOut,
     ToHex,
 )
 from test_framework.script import OP_FALSE, OP_RETURN, CScript
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error, try_rpc
 
 
 class CoinStatsIndexTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 2
         self.supports_cli = False
         self.extra_args = [
             [],
             ["-coinstatsindex"]
         ]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
 
     def run_test(self):
         self._test_coin_stats_index()
+        self._test_use_index_option()
 
     def block_sanity_check(self, block_info):
         block_subsidy = 50_000_000
         assert_equal(
             block_info['prevout_spent'] + block_subsidy,
             block_info['new_outputs_ex_coinbase'] + block_info['coinbase']
             + block_info['unspendable']
         )
 
     def _test_coin_stats_index(self):
         node = self.nodes[0]
         index_node = self.nodes[1]
         # Both none and muhash options allow the usage of the index
         index_hash_options = ['none', 'muhash']
 
         # Generate a normal transaction and mine it
         node.generate(101)
         address = self.nodes[0].get_deterministic_priv_key().address
         node.sendtoaddress(
             address=address,
             amount=10_000_000,
             subtractfeefromamount=True)
         node.generate(1)
 
         self.sync_blocks(timeout=120)
 
         self.log.info(
             "Test that gettxoutsetinfo() output is consistent with or without coinstatsindex option")
         self.wait_until(lambda: not try_rpc(-32603,
                         "Unable to read UTXO set", node.gettxoutsetinfo))
         res0 = node.gettxoutsetinfo('none')
 
         # The fields 'disk_size' and 'transactions' do not exist on the index
         del res0['disk_size'], res0['transactions']
 
         self.wait_until(lambda: not try_rpc(-32603,
                                             "Unable to read UTXO set",
                                             index_node.gettxoutsetinfo,
                                             'muhash'))
         for hash_option in index_hash_options:
             res1 = index_node.gettxoutsetinfo(hash_option)
             # The fields 'block_info' and 'total_unspendable_amount' only exist
             # on the index
             del res1['block_info'], res1['total_unspendable_amount']
             res1.pop('muhash', None)
 
             # Everything left should be the same
             assert_equal(res1, res0)
 
         self.log.info(
             "Test that gettxoutsetinfo() can get fetch data on specific "
             "heights with index")
 
         # Generate a new tip
         node.generate(5)
 
         self.wait_until(lambda: not try_rpc(-32603, "Unable to read UTXO set",
                                             index_node.gettxoutsetinfo,
                                             'muhash'))
         for hash_option in index_hash_options:
             # Fetch old stats by height
             res2 = index_node.gettxoutsetinfo(hash_option, 102)
             del res2['block_info'], res2['total_unspendable_amount']
             res2.pop('muhash', None)
             assert_equal(res0, res2)
 
             # Fetch old stats by hash
             res3 = index_node.gettxoutsetinfo(hash_option, res0['bestblock'])
             del res3['block_info'], res3['total_unspendable_amount']
             res3.pop('muhash', None)
             assert_equal(res0, res3)
 
             # It does not work without coinstatsindex
             assert_raises_rpc_error(
                 -8, "Querying specific block heights requires coinstatsindex",
                 node.gettxoutsetinfo, hash_option, 102)
 
         self.log.info("Test gettxoutsetinfo() with index and verbose flag")
 
         for hash_option in index_hash_options:
             # Genesis block is unspendable
             res4 = index_node.gettxoutsetinfo(hash_option, 0)
             assert_equal(res4['total_unspendable_amount'], 50_000_000)
             assert_equal(res4['block_info'], {
                 'unspendable': 50_000_000,
                 'prevout_spent': 0,
                 'new_outputs_ex_coinbase': 0,
                 'coinbase': 0,
                 'unspendables': {
                     'genesis_block': 50_000_000,
                     'bip30': 0,
                     'scripts': 0,
                     'unclaimed_rewards': 0
                 }
             })
             self.block_sanity_check(res4['block_info'])
 
             # Test an older block height that included a normal tx
             res5 = index_node.gettxoutsetinfo(hash_option, 102)
             assert_equal(res5['total_unspendable_amount'], 50_000_000)
             assert_equal(res5['block_info'], {
                 'unspendable': 0,
                 'prevout_spent': 50_000_000,
                 'new_outputs_ex_coinbase': Decimal('49999997.75'),
                 'coinbase': Decimal('50000002.25'),
                 'unspendables': {
                     'genesis_block': 0,
                     'bip30': 0,
                     'scripts': 0,
                     'unclaimed_rewards': 0
                 }
             })
             self.block_sanity_check(res5['block_info'])
 
         # Generate and send a normal tx with two outputs
         tx1_inputs = []
         tx1_outputs = {self.nodes[0].getnewaddress(): 21_000_000,
                        self.nodes[0].getnewaddress(): 42_000_000}
         raw_tx1 = self.nodes[0].createrawtransaction(tx1_inputs, tx1_outputs)
         funded_tx1 = self.nodes[0].fundrawtransaction(raw_tx1)
         signed_tx1 = self.nodes[0].signrawtransactionwithwallet(
             funded_tx1['hex'])
         tx1_txid = self.nodes[0].sendrawtransaction(signed_tx1['hex'])
 
         # Find the right position of the 21 000 000 XEC output
         tx1_final = self.nodes[0].gettransaction(tx1_txid)
         for output in tx1_final['details']:
             if output['amount'] == Decimal(
                     '21000000.00') and output['category'] == 'receive':
                 n = output['vout']
 
         # Generate and send another tx with an OP_RETURN output (which is
         # unspendable)
         tx2 = CTransaction()
         tx2.vin.append(CTxIn(COutPoint(int(tx1_txid, 16), n), b''))
         tx2.vout.append(CTxOut(int(20_990_000 * XEC),
                                CScript([OP_RETURN] + [OP_FALSE] * 30)))
         tx2_hex = self.nodes[0].signrawtransactionwithwallet(ToHex(tx2))['hex']
         self.nodes[0].sendrawtransaction(tx2_hex)
 
         # Include both txs in a block
         self.nodes[0].generate(1)
         self.sync_all()
 
         self.wait_until(lambda: not try_rpc(-32603, "Unable to read UTXO set",
                                             index_node.gettxoutsetinfo, 'muhash'))
         for hash_option in index_hash_options:
             # Check all amounts were registered correctly
             res6 = index_node.gettxoutsetinfo(hash_option, 108)
             assert_equal(
                 res6['total_unspendable_amount'],
                 Decimal('70990000.00'))
             assert_equal(res6['block_info'], {
                 'unspendable': Decimal('20990000.00'),
                 'prevout_spent': 111_000_000,
                 'new_outputs_ex_coinbase': Decimal('89999995.94'),
                 'coinbase': Decimal('50010004.06'),
                 'unspendables': {
                     'genesis_block': 0,
                     'bip30': 0,
                     'scripts': Decimal('20990000.00'),
                     'unclaimed_rewards': 0
                 }
             })
             self.block_sanity_check(res6['block_info'])
 
         # Create a coinbase that does not claim full subsidy and also
         # has two outputs
         cb = create_coinbase(109, nValue=35_000_000)
         cb.vout.append(CTxOut(5_000_000 * XEC, CScript([OP_FALSE])))
         cb.rehash()
 
         # Generate a block that includes previous coinbase
         tip = self.nodes[0].getbestblockhash()
         block_time = self.nodes[0].getblock(tip)['time'] + 1
         block = create_block(int(tip, 16), cb, block_time)
         block.solve()
         self.nodes[0].submitblock(ToHex(block))
         self.sync_all()
 
         self.wait_until(lambda: not try_rpc(-32603, "Unable to read UTXO set",
                                             index_node.gettxoutsetinfo, 'muhash'))
         for hash_option in index_hash_options:
             res7 = index_node.gettxoutsetinfo(hash_option, 109)
             assert_equal(
                 res7['total_unspendable_amount'],
                 Decimal('80990000.00'))
             assert_equal(res7['block_info'], {
                 'unspendable': 10_000_000,
                 'prevout_spent': 0,
                 'new_outputs_ex_coinbase': 0,
                 'coinbase': 40_000_000,
                 'unspendables': {
                     'genesis_block': 0,
                     'bip30': 0,
                     'scripts': 0,
                     'unclaimed_rewards': 10_000_000
                 }
             })
             self.block_sanity_check(res7['block_info'])
 
         self.log.info("Test that the index is robust across restarts")
 
         res8 = index_node.gettxoutsetinfo('muhash')
         self.restart_node(1, extra_args=self.extra_args[1])
         res9 = index_node.gettxoutsetinfo('muhash')
         assert_equal(res8, res9)
 
         index_node.generate(1)
         self.wait_until(lambda: not try_rpc(-32603, "Unable to read UTXO set",
                                             index_node.gettxoutsetinfo, 'muhash'))
         res10 = index_node.gettxoutsetinfo('muhash')
         assert(res8['txouts'] < res10['txouts'])
 
+    def _test_use_index_option(self):
+        self.log.info("Test use_index option for nodes running the index")
+
+        self.connect_nodes(0, 1)
+        self.nodes[0].waitforblockheight(110)
+        res = self.nodes[0].gettxoutsetinfo('muhash')
+        option_res = self.nodes[1].gettxoutsetinfo(
+            hash_type='muhash', hash_or_height=None, use_index=False)
+        del res['disk_size'], option_res['disk_size']
+        assert_equal(res, option_res)
+
 
 if __name__ == '__main__':
     CoinStatsIndexTest().main()